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Kenyon Gatlin
Anatomy - Weeks 6-12, Assignment 2
| Question | Answer |
|---|---|
| Bundles of myelinated fibers make up the | white matter of the nervous system. |
| The _____ of a neuron is a single process that usually extends from a tapered portion of the cell body. | axon |
| The efferent pathways of the autonomic nervous system can be divided into the __________ divisions. | parasympathetic and sympathetic |
| The structural and functional center of the entire nervous system is the _____ nervous system. | central |
| The ________ of a presynaptic neuron associates with the dendrite of a postsynaptic neuron. | axon terminal |
| This is the site of communication between neurons. | synapse |
| Excitable cells that conduct the impulses are called | neurons |
| The somatic nervous system carries information to the | skeletal muscles. |
| A signal conduction route to and from the central nervous system is a(n) | reflex arc. |
| Chemical signals diffuse between neurons at this location. | synapse |
| What structure of the Schwann cell is essential to normal nerve growth and the regeneration of injured nerve fibers? | neurilemma |
| Which of the following is not a structural classification of neurons? | polar |
| What term describes the bundles of nerve fibers within the central nervous system? | tracts |
| Neurons have | very limited capacity to repair themselves. |
| This tends to be the longest cytoplasmic projection from a neuron. | axon |
| These regions of the neuron direct electrical currents toward the cell body. | dendrite |
| 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 |
| The glia cells that help form the blood-brain barrier are the | astrocytes |
| Nerves that originate from the brain are called _____ nerves. | cranial |
| Which of the following is the deepest connective tissue layer of a nerve? | Endoneurium |
| Which of the following compounds cannot cross the blood-brain barrier? | Dopamine |
| Along a neuron, the correct pathway for impulse conduction is: | dendrite, cell body, and axon. |
| Astrocytes attach to: | neurons and blood vessels. |
| A neuron that transmits a nerve impulse toward the central nervous system is called a(n): | sensory neuron. |
| Nerves that contain mostly afferent fibers are called _____ nerves. | sensory |
| Most unipolar neurons are usually: | sensory neurons. |
| A neuron that has only one axon but several dendrites is classified as a _____ neuron. | multipolar |
| The autonomic nervous system does not stimulate: | skeletal muscles. |
| One of the components of the blood-brain barrier is: | astrocytes. |
| Which is not true of the myelin sheath? | It covers cell bodies in the brain and spinal cord. |
| The part of the nervous system that transmits impulses from the CNS to the skeletal muscle is the: | somatic nervous system. |
| Regeneration of nerve fibers will take place only if the cell body is intact and the fibers have: | a neurilemma. |
| The enteric nervous system is made up of a complex network of nerve plexuses that control the visceral effectors in the | intestinal wall. |
| The large fluid-filled spaces within the brain are called the | ventricles. |
| The ventral rami of most spinal nerves subdivide to form complex networks called | plexuses |
| How many pairs of spinal nerves are connected to the spinal cord? | 31 |
| A subdivision of the nervous system that regulates involuntary effectors is the _____ nervous system. | autonomic |
| Individual nerves that emerge from the _____ plexus innervate the lower part of the shoulder and the entire arm. | brachial |
| The brainstem does not include the: | cerebellum |
| Spinal nerves are _____ fibers. | motor and sensory |
| The phrenic nerve is found in the _____ plexus. | cervical |
| Sensory neurons can operate in autonomic reflex arcs. True or False? | True |
| Conduction to autonomic effectors requires only one efferent neuron. True or false? | False. |
| Which of the following cranial nerves is responsible for movements of the tongue? | Hypoglossal |
| 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 |
| Nerve fibers of the spinothalamic tract are: | sensory. |
| Mechanical devices that permit the flow of blood in one direction only are called | valves. |
| A graphic record of the heart’s electrical activity is a(n) | ECG. |
| Which of the following is not a formed element found in the blood? | plasma |
| The type of membranous tissue that lines the heart and blood vessels is the | endothelium. |
| The term blood type refers to the type of blood cell | antigen. |
| Which division of the autonomic nervous system sends fibers to the heart? | sympathetic and somatic. |
| A glycoprotein hormone that is secreted to increase oxygen concentration in the tissues is | erythropoietin. |
| The internal iliac artery supplies blood to the | pelvis. |
| The _____ is(are) supplied with blood from the left subclavian artery. | head and upper extremities |
| Renal veins drain blood from the | kidneys. |
| A decrease in the amount of white blood cells is called | leukopenia. |
| The brachiocephalic vein drains blood from the | head, neck, and upper extremity. |
| The heart has its own special covering, a loose-fitting inextensible sac called the | pericardium |
| Activities that result in central movement or flow of lymph are called | lymphokinetic activities. |
| Because T cells attack pathogens more directly, T-cell immune mechanisms are classified as _____ immunity. | cell-mediated |
Created by:
ksgatlin2012