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SCI220-Stack#2
WEEK 7-13
| Question | Answer |
|---|---|
| A signal conduction route to and from the central nervous system is a(n) | reflex arc. |
| The efferent pathways of the autonomic nervous system can be divided into the __________ divisions | parasympathetic and sympathetic |
| Nerves that originate from the brain are called _____ nerves. | cranial |
| The _____ of a neuron is a single process that usually extends from a tapered portion of the cell body. | axon |
| The glia cells that help form the blood-brain barrier are the | astrocytes |
| Which of the following is not a structural classification of neurons? | polar |
| Chemical signals diffuse between neurons at this location. | synapse |
| The somatic nervous system carries information to the | skeletal muscles. |
| This is the site of communication between neurons. | synapse |
| What structure of the Schwann cell is essential to normal nerve growth and the regeneration of injured nerve fibers? | neurilemma |
| These regions of the neuron direct electrical currents toward the cell body. | dendrite |
| Excitable cells that conduct the impulses are called | neurons |
| This tends to be the longest cytoplasmic projection from a neuron. | axon |
| The ________ of a presynaptic neuron associates with the dendrite of a postsynaptic neuron. | axon terminal |
| The _____ nervous system is a complex network of nerve pathways embedded in the intestinal wall with a network of integrators and feedback loops that can act somewhat independently. | enteric |
| Which of these glia cells are located in the peripheral nervous system? | Schwann cells |
| Neurons have | very limited capacity to repair themselves |
| Bundles of myelinated fibers make up the | white matter of the nervous system |
| What term describes the bundles of nerve fibers within the central nervous system? | tracts |
| The structural and functional center of the entire nervous system is the _____ nervous system. | central |
| One of the components of the blood-brain barrier is: | astrocytes |
| Neurons in the CNS have less chance of regenerating for all of the following reasons except: | microglia lay down scar tissue |
| Which of the following is the deepest connective tissue layer of a nerve? | Endoneurium |
| The nervous system is organized to do which of the following? | Detect changes in the external environment. Detect changes in the internal environment. Evaluate changes in the environment. All of the above are true. |
| A neuron that transmits a nerve impulse toward the central nervous system is called a(n): | sensory neuron |
| Astrocytes attach to: | neurons and blood vessels |
| Dendrites conduct impulses _____ cell bodies | toward |
| A neuron that has only one axon but several dendrites is classified as a _____ neuron. | multipolar |
| In the human nervous system: | there are almost equal numbers of glia cells and neurons. |
| Nerves that contain mostly afferent fibers are called _____ nerves. | sensory |
| The nervous system can be divided: | according to its structure. according to direction of information flow. by control of effectors. |
| Gray matter in the brain and spinal cord consists primarily of: | cell bodies |
| The white matter of the nervous system is made up of: | myelinated fibers |
| Along a neuron, the correct pathway for impulse conduction is: | dendrite, cell body, and axon |
| The largest and most numerous types of neuroglia are the: | astrocytes |
| Which is true of a reflex arc? | It always consists of an afferent neuron and an efferent neuron. |
| The part of the nervous system that transmits impulses from the CNS to the skeletal muscle is the: | somatic nervous system |
| Small distinct regions of gray matter in the CNS are called: | nuclei |
| The lymphatic system, like the circulatory system, is a closed circuit. | True |
| Which of the following compounds cannot cross the blood-brain barrier? | Dopamine |
| Which is not true of the myelin sheath? | It covers cell bodies in the brain and spinal cord. |
| Which of the following is not a function of the central nervous system (CNS)? | Integrating sensory information Evaluating the information Initiating an outgoing response |
| The afferent pathways of the autonomic nervous system: | carry feedback information to integrating centers in the brain |
| The autonomic nervous system does not stimulate: | skeletal muscles |
| Interneurons reside in the: | CNS only |
| Most unipolar neurons are usually: | sensory neurons |
| The efferent pathways of the autonomic nervous system consist of the ________ nervous systems. | sympathetic and parasympathetic |
| Fascicles are held together by a connective tissue layer called the: | perineurium |
| Multipolar neurons have: | multiple dendrites and one axon. |
| Regeneration of nerve fibers will take place only if the cell body is intact and the fibers have: | a neurilemma |
| Dendrites and cell bodies of sympathetic preganglionic neurons are located in the | gray matter of the thoracic and upper lumbar segments of the spinal cord. |
| The enteric nervous system is made up of a complex network of nerve plexuses that control the visceral effectors in the | intestinal wall |
| The three divisions of the brain that make up the brainstem are the | medulla oblongata, midbrain, and pons |
| Spinal cord tracts provide conduction paths to and from the brain. The tracts that conduct sensory impulses down the cord from the brain are called _____ tracts. | descending |
| The large fluid-filled spaces within the brain are called the | ventricles |
| Individual nerves that emerge from the _____ plexus innervate the lower part of the shoulder and the entire arm. | brachial |
| The dorsal root of each spinal nerve is easily recognized as a swelling called the | dorsal root ganglion |
| If you trace the axon inside the sympathetic chain ganglion, the preganglionic fiber branches along which pathway? | synapses with a sympathetic postganglionic neuron sends ascending or descending branches through the sympathetic trunk to synapse with postganglionic neurons in other chain ganglia passes through one or more ganglia without synapsing |
| A subdivision of the nervous system that regulates involuntary effectors is the _____ nervous system. | autonomic |
| The inner protective covering of the brain is called the | meninges |
| The ventral rami of most spinal nerves subdivide to form complex networks called | plexuses |
| The two efferent divisions of the autonomic nervous system are the | sympathetic and parasympathetic divisions |
| Formation of the cerebrospinal fluid occurs in the | choroid plexus |
| The lower end of the spinal cord, with its attached spinal nerve roots, gives the appearance of a horse’s tail called the | cauda equina |
| All cell bodies of the autonomic nervous system are located within the CNS. | False |
| Cerebrospinal fluid circulates through the ventricles, into the central canal, and _____, and is absorbed back into the blood. | subarachnoid space |
| The spinal ganglion can be found on the _____ of the spinal nerve. | dorsal nerve root |
| Spinal nerves are _____ fibers | motor and sensory |
| Which of the following is a correct statement? | There are 5 lumbar nerve pairs |
| Cerebrospinal fluid is found in all of the following except the: | subdural space |
| The phrenic nerve is found in the _____ plexus | cervical |
| The lumbar plexus gives rise to the _____ nerve. | femoral |
| Several “vital centers” are located in the: | medulla |
| All of the following are characteristics of sympathetic preganglionic neurons except: | they have long fibers from CNS to ganglion. |
| Which of the following is not true of the lateral corticospinal tract fibers? | Most inhibit the lower motor neuron |
| Sensory neurons can operate in autonomic reflex arcs. | True |
| The areas specializing in language functions are found in the left cerebral hemisphere in: | about 90% of the population |
| Small branches from the cervical plexus join which two cranial nerves? | Hypoglossal and accessory |
| The cranial nerve that arises from the spinal cord is the: | accessory |
| The layer of the meninges that serves as the inner periosteum of the cranial bone is the: | dura mater |
| The spinal tract is located on the side of the cord, originates in the brain, and terminates in the spinal cord in the _____ tract. | lateral corticospinal |
| Beta receptors: | bind norepinephrine |
| The brain has _____ major divisions | six |
| The nerve commonly called the vagus nerve is the _____ cranial. | tenth |
| Axon terminals that secrete acetylcholine are called cholinergic terminals. | True |
| The innermost layer of the meninges is the: | pia mater |
| Parasympathetic neuron cell bodies are located in: | nuclei of the brainstem and the lateral gray columns of the sacral cord |
| A patient complains of numbness in the skin of the buttocks and the posterior surface of the thigh and leg. The spinal nerve or peripheral branch most likely involved with this condition is the _____ plexus. | coccygeal |
| The main divisions of the central nervous system are the: | brain and spinal cord. |
| Visceral effectors are innervated by sympathetic fibers. | True |
| The sensory cranial nerves include only the: | olfactory, optic, and vestibulocochlear |
| Nerve fibers of the spinothalamic tract are: | sensory |
| Which of the following is not true? | One bundle of nerve fibers (nerve roots) projects from each side of the spinal cord |
| Some parasympathetic postganglionic neurons have their cell bodies in nuclei in the brainstem. | False |
| Endolymph is made | in the stria vascularis |
| The hormone produced by the heart | increases the excretion of sodium in the urine |
| Region of the adrenal cortex that secretes DHEA | zona reticularis |
| Which of the following endocrine glands develops primarily from the endoderm of the pharynx? | thyroid and parathyroids |
| Region of the hypophysis that contains secretory endocrine cells derived from the oral ectoderm | adenohypophysis |
| Gustatory cells are located in all of the following areas except | on the apical surface of vallate papillae on the tongue |
| Class of hormones secreted during chronic stress that depress immune function | glucocorticoids |
| The basilar membrane supports the | spiral organ |
| The hypophyseal portal veins are primarily located in the | infundibulum |
| Melanin-containing layer of the eye's vascular tunic | choroid |
| The nerve carrying taste information from the anterior two-thirds of the tongue is the | facial |
| Gel-like structure embedded with the tips of cochlear hair cells. | tectorial membrane |
| Which of the following statements does not correctly describe the spiral organ of Corti? | The tectorial membrane bends with vibrations, whereas the basilar membrane is rigid and fixed |
| Which of the following areas has the highest concentration of cones? | the fovea centralis |
| The anatomical stalk of the pituitary is also known as | infundibulum |
| Transparent structure of the eye containing regularly aligned collagen fibers. | cornea |
| Pyramid-shaped gland consisting of neural crest-derived cells and endocrine secretory cells. | adrenal gland |
| Largest purely endocrine gland in the body | thyroid gland |
| Which of the following is not part of the flow of taste sensation along the gustatory pathway to the cerebral cortex? | hypothalamic appetite centers |
| Bony labyrinth structure containing the utricle and saccule. | vestibule |
| Pancreatic cell type that produces insulin | beta cells |
| Transparent mucous membrane covering the inner surface of the eyelid. | conjunctiva |
| Which of the following minerals is essential for the formation of thyroid hormone? | iodine |
| Which endocrine gland stores enough of its hormone extracellularly to last several months? | the thyroid |
| Endocrine gland of the thorax that is also important in immune function. | thymus gland |
| Endolymph-filled structure containing receptors for hearing. | cochlear duct |
| Membrane attached to the stapes | oval window |
| Hormone that inhibits osteoclast activity in children | calcitonin |
| Fluid filling the posterior segment of the eye | vitreous humor |
| Receptors for hearing are located in the | cochlear duct |
| Endolymph is made | in the stria vascularis |
| The hormone produced by the heart | increases the excretion of sodium in the urine |
| Region of the adrenal cortex that secretes DHEA | zona reticularis |
| Which of the following endocrine glands develops primarily from the endoderm of the pharynx? | thyroid and parathyroids |
| Region of the hypophysis that contains secretory endocrine cells derived from the oral ectoderm. | adenohypophysis |
| Gustatory cells are located in all of the following areas except | on the apical surface of vallate papillae on the tongue |
| Class of hormones secreted during chronic stress that depress immune function | glucocorticoids |
| The basilar membrane supports the | spiral organ |
| The hypophyseal portal veins are primarily located in the | infundibulum |
| Melanin-containing layer of the eye's vascular tunic. | choroid |
| The nerve carrying taste information from the anterior two-thirds of the tongue is the | facial |
| Gel-like structure embedded with the tips of cochlear hair cells. | tectorial membrane |
| Which of the following statements does not correctly describe the spiral organ of Corti? | The tectorial membrane bends with vibrations, whereas the basilar membrane is rigid and fixed. |
| Which of the following areas has the highest concentration of cones? | the fovea centralis |
| The anatomical stalk of the pituitary is also known as | infundibulum |
| Transparent structure of the eye containing regularly aligned collagen fibers. | cornea |
| Pyramid-shaped gland consisting of neural crest-derived cells and endocrine secretory cells. | adrenal gland |
| Largest purely endocrine gland in the body | thyroid gland |
| Which of the following is not part of the flow of taste sensation along the gustatory pathway to the cerebral cortex? | Which of the following is not part of the flow of taste sensation along the gustatory pathway to the cerebral cortex? |
| Bony labyrinth structure containing the utricle and saccule. | vestibule |
| Pancreatic cell type that produces insulin | beta cells |
| Transparent mucous membrane covering the inner surface of the eyelid. | conjunctiva |
| Which of the following minerals is essential for the formation of thyroid hormone? | iodine |
| Which endocrine gland stores enough of its hormone extracellularly to last several months? | the thyroid |
| Endocrine gland of the thorax that is also important in immune function. | thymus gland |
| Endolymph-filled structure containing receptors for hearing. | cochlear duct |
| Membrane attached to the stapes | oval window |
| Hormone that inhibits osteoclast activity in children | calcitonin |
| Fluid filling the posterior segment of the eye. | vitreous humor |
| Receptors for hearing are located in the | cochlear duct |
| Which two factors promote the return of venous blood to the heart? | blood-pumping action of respirations and skeletal muscle contractions |
| The localized pressure gradient needed to maintain blood flow in a tissue is called | perfusion pressure |
| Inhibition of sympathetic vasoconstrictor impulses is considered a major mechanism of | vasodilation |
| The term used to describe the collection of mechanisms that influence the circulation of blood is: | hemodynamics |
| The difference between systolic pressure and diastolic pressure is called | pulse pressure |
| Blood viscosity stems mainly from the red blood cells but also partly from the _____ in blood. | protein molecules present |
| Cardiac output is determined by | stroke volume and heart rate |
| Starling’s law of the heart states that, within limits, the longer, or more stretched, the heart fibers are at the beginning of the contraction, the | stronger the contraction |
| The bulk of the heart wall is the thick, contractile middle layer called the | myocardium |
| A graphic record of the heart’s electrical activity is a(n) | ECG |
| Atria are often called _____ because they receive blood from vessels called veins | receiving chambers |
| The _____ is(are) supplied with blood from the left subclavian artery | head and upper extremities |
| The structure referred to as the pacemaker of the heart is(are) the: | SA node |
| The term blood type refers to the type of blood cell | antigen |
| A glycoprotein hormone that is secreted to increase oxygen concentration in the tissues is | erythropoietin |
| The brachiocephalic vein drains blood from the | head, neck, and upper extremity |
| Mechanical devices that permit the flow of blood in one direction only are called | valves |
| The normal ECG is composed of all of the following except a | E wave |
| Which layer of the larger blood vessels is made up of endothelium? | tunica intima |
| The outermost layer of the larger blood vessels is the tunica | adventitia |
| The internal iliac artery supplies blood to the | pelvis |
| After blood leaves the lungs and returns to the heart, it enters the | left atrium |
| The normal cardiac impulse that initiates mechanical contraction of the heart arises in the | SA node |
| Which division of the autonomic nervous system sends fibers to the heart? | sympathetic parasympathetic |
| The type of membranous tissue that lines the heart and blood vessels is the | endothelium |
| Microscopic vessels that carry blood from small arteries to small veins are | capillaries |
| _____ is used to determine the volume percentage of red blood cells in whole blood. | Hematocrit |
| The heart has its own special covering, a loose-fitting inextensible sac called the | pericardium |
| The molecule that makes up 95% of the dry weight of each red blood cell and is responsible for the red pigment is | hemoglobin |
| Which mature cell has no nucleus, mitochondria, or ribosomes? | Erythrocyte |
| In _____, blood moves from veins to other veins or arteries to other arteries without passing through an intervening capillary network. | vascular anastomoses |
| The four structures that compose the conduction system of the heart are the | SA node, AV node, AV bundle, and Purkinje fibers |
| Which types of arteries are also called conducting arteries and include the aorta? | elastic arteries |
| During fetal circulation, what opening in the septum, between the right and left atria, directs most of the blood so that it bypasses the fetal lungs? | foramen ovale |
| From which vessels do myocardial cells receive blood? | coronary arteries |
| Erythrocytes begin their maturation sequence in red bone marrow from nucleated cells known as: | hematopoietic stem cells |
| All of the following are granulocytes except | lymphocytes |
| The structural components of the circulatory system include the: | heart and blood vessels |
| Because T cells attack pathogens more directly, T-cell immune mechanisms are classified as _____ immunity. | cell-mediated |
| An infection in the thumb may result in enlargement of the _____ nodes | superficial cubital |
| The type of immune mechanism that provides a general defense by acting against anything recognized as “not self” is called: | nonspecific immunity |
| Adaptive immunity, part of the body’s third line of defense, is orchestrated by two different classes of a type of white blood cell called the | lymphocyte |
| The cisterna chyli: | originates in the thoracic duct. |
| Interferon inhibits the spread of: | viruses cancer |
| The lymphatic system, like the circulatory system, is a closed circuit. | False |
| The lymph nodes located just above the bend of the elbow are called the _____ lymph nodes. | supratrochlear |
| The main difference between the composition of lymph and interstitial fluid and the composition of plasma is the _____ percentage of _____ in lymph and interstitial fluid. | lower; proteins |
| The tonsils located near the posterior opening of the nasal cavity are called the _____ tonsils. | pharyngeal |
| Lacteals: | are the lymphatics in the villi of the small intestines. are able to absorb fat from the digestive system. |
| Antibodies are proteins of the family called | immunoglobulins |
| Which of the following is not a lymph organ? | Pancreas |
| The internal environment of the human body is protected by the _____, which is(are) referred to as the first line of defense. | skin |
| During their residence in the thymus, pre-T cells develop into _____, cells that proliferate as rapidly as any in the body. | thymocytes |
| Which of the following is a true statement? | Lymph from the entire body, except the upper right quadrant, drains eventually into the thoracic duct. |
| Each cortical nodule is composed of packed lymphocytes that surround a less dense area called a | germinal center |
| Lymph ducts empty into the circulatory system, draining into the: | subclavian veins |
| Lymphatics resemble veins except that lymphatics: | have thinner walls. contain more valves. contain lymph nodes located at certain intervals along their course. |
| The breast—the mammary gland and surrounding tissue—is drained by the: | lymphatics that originate in and drain the skin over the breast with the exception of the areola and nipple. lymphatics that originate in and drain the substance of the breast itself, as well as the skin of the areola and nipple. |
| The primary organ of the lymphatic system is the | thymus |
| About half of the lymph flowing through the thoracic duct comes from the: | liver. small intestine. |
| The size of lymph nodes varies from _____ mm to more than _____ mm in diameter. | 1; 20 |
| The spleen is located in the _____ region | left hypochondriac |
| The lymph nodes located in the groin are called the: | inguinal lymph nodes |
| Masses of lymphoid tissue located in a protective ring under the mucous membranes in the mouth and the back of the throat are called | tonsils |
| Lymph capillaries called lacteals are located in the: | small intestine |
| Which substance can destroy pathogens by lowering the pH to a level at which they cannot function? | Hydrochloric acid |
| Hassall corpuscles are part of the: | thymus |
| A type of blood cell produced by lymph nodes is called a(n) | monocyte |
| If you were to trace the movement of air through the nose into the pharynx, it would pass through the following structures in which order? | anterior nares, vestibule, meatus, and posterior nares |
| The air-containing spaces that open, or drain, into the nasal cavity are called | paranasal sinuses |
| Which organ consists largely of cartilages that are attached to one another and to surrounding structures by muscles or fibrous and elastic tissue components? | larynx |
| The vibrissae function as | filters |
| The trachea, bronchial tree, and lungs make up the | lower respiratory tract |
| The surface of the respiratory membrane inside each alveolus is coated with a fluid containing | surfactant |
| An inflammation of the lower respiratory tract that involves the airways of the lungs is called | pneumonia |
| The roof of the nose is separated from the cranial cavity by a portion of the ethmoid bone called the | cribriform plate |
| A common condition characterized by acute inflammation of the tracheobronchial tree is | acute bronchitis |
| During respiration, the thorax | becomes larger when the chest is raised |
| Gas exchange occurs only in the | alveoli |
| The _____ of each lung lies against the ribs and is rounded to match the contours of the thoracic cavity. | costal surface |
| The small leaf-shaped cartilage that projects upward behind the tongue and hyoid bone is the | epiglottis |
| The microscopic cilia function to | move mucus toward the pharynx |
| The trachea divides at its lower end into two | primary bronchi |
| The structures that deflect air as it passes through the nose are called: | conchae |
| Which of the following is not lined with a ciliated mucous membrane? | Vestibule |
| The eustachian tube connects the middle ear with the: | nasopharynx |
| The smallest branches of the bronchial tree are: | bronchioles |
| Which of the following is not part of the respiratory membrane? | Ciliated respiratory mucosa |
| The structure in the neck known as the “Adam’s apple” is the: | thyroid cartilage |
| The hollow nasal cavity is separated by a midline partition called the: | septum |
| Olfactory epithelium is found: | covering the superior turbinate |
| The approximate length of the trachea, or windpipe, is _____ cm. | 11 |
| The small, leaf-shaped cartilage behind the tongue and hyoid bone is the: | epiglottis |
| Paranasal sinuses are normally filled with: | air |
| The upper respiratory tract includes all of the following structures except the: | trachea |
| Which of the following is not an accessory structure of the respiratory system? | Trachea |
| The respiratory portion of the nasal passage is lined with a mucous membrane made up of _____ epithelium. | pseudostratified columnar |
| The anatomical division of the pharynx that is located behind the mouth from the soft palate above to the level of the hyoid bone below is called the: | oropharynx |
| The lower border of the cavity of the larynx is formed by the: | cricoid cartilage. |
| The fauces, one of the seven openings found in the pharynx, opens into the: | oropharynx |
| The more common name for the pharynx is the: | throat |
| The external openings to the nasal cavities can be referred to as: | nostrils. anterior nares. external nares |
| Anatomically, how does the right bronchus differ from the left bronchus, and what effect might this have on the aspiration of objects? | The right bronchus is slightly larger and more vertical than the left. This anatomical fact helps explain why aspirated foreign objects frequently lodge in the right bronchus. |
| In the right lung, the superior and middle lobes are separated by the: | horizontal fissure. |
| The total number of lobes in both lungs is: | 5 |
| Which of the following is true of the cribriform plate? | It separates the nasal and cranial cavities |
| The largest of the paranasal sinuses is the: | maxillary |
| All of the following are true regarding the structure of Surfactant except: | produced in the main stem bronchus |
| The respiratory system can be divided into what two parts? | Upper respiratory tract and lower respiratory tract |
| Which of these structures is not found in the left lung? | Horizontal fissure |
| Which of the following is true of the intrinsic muscles of the larynx? | They serve in voice production |
| Which of the following lists the correct sequence of air as it passes through the nose into the pharynx? | Anterior nares vestibule inferior, middle, and superior meatus posterior nares |
| The divisions of the thoracic cavity include all of the following except the: | respiratory cavity |
| The hard palate consists of portions of: | four bones: two maxillae and two palatines |
| The numerous small elevations on the surface of the tongue that support taste buds are called: | papillae |
| The fan-shaped projection of peritoneum that connects the small intestine to the posterior abdominal wall is the: | mesentery |
| The proper anatomical order for the divisions of the colon is: | ascending, transverse, descending, and sigmoid |
| Approximately how much saliva do the three pairs of compound tubuloalveolar glands (parotids, submandibulars, and sublinguals) secrete each day? | 1 liter |
| Microvilli can be found in the: | small intestine. large intestine. |
| Which of the following is not an anatomical part of the small intestine? | Cecum |
| The flap of tissue suspended from the midpoint of the posterior border of the soft palate is the: | uvula |
| The most essential part of bile is: | bile salts |
| All of the following are classified as accessory organs of the digestive system except the: | mouth |
| The extrinsic tongue muscles differ from the intrinsic tongue muscles in that the _____ outside the tongue. | extrinsic muscles insert into the tongue but have their origin |
| The right angle between the transverse colon and the ascending colon is the: | hepatic flexure. |
| A barium enema study is used to detect and locate: | polyps. tumors. diverticula. |
| Which of the following organs has a mucosa layer composed of stratified squamous epithelium that resists abrasion? | Esophagus |
| Bile is secreted by: | hepatic cells |
| The part of the colon that lies in the vertical position, on the left side of the abdomen, extending from a point below the stomach and spleen to the level of the iliac crest is the _____ colon. | descending |
| Which of the following papillae of the tongue lack taste buds? | Filiform |
| The type of tissue designed for absorption and secretion found throughout much of the GI tract is _____ epithelium. | simple columnar |
| An incision into the wall of the GI tract would cut, in order, from superficial to deep: | serosa, muscularis, submucosa, and mucosa |
| Phagocytic cells lining liver sinusoids are called _____ cells. | Kupffer |
| The more common term for deglutition is: | swallowing |
| Which of the following salivary glands produces only a mucus type of saliva? | Sublinguals |
| The walls of the GI tract are composed of ____ layers of tissue. | four |
| Which of the following structures is anatomically the longest? | Ileum |
| The longest portion of the small intestine is the: | ileum |
| Which of the following organs has a mucosal layer that is composed of columnar epithelium with a brush border of microvilli to enhance absorption? | Small intestine |
| Which of the following is not a lobe of the liver? | Medial lobe |
| The substance that forms the outer covering of the neck and root of a tooth is: | cementum |
| After leaving the stomach, food enters the: | small intestine |
| Surgical removal of the gallbladder is referred to as: | cholecystectomy |
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