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Phys week 8 - Ch 20,
Phys week 8 - Ch 20,21,22
| If the center of a reflex arc is the brain, the response it mediates is called a | Cranial reflex |
| The limbic system integrates | emotion |
| The effect of sympathetic stimulation on the urinary bladder is | Relaxation |
| The groove between the frontal and parietal lobes of the cerebral cortex is the | central sulcus. |
| The most numerous cerebral tracts are the | association tracts. |
| The second largest part of the brain, located just below the posterior portion of the cerebrum, is the | Cerebellum |
| Which of the following is NOT an example of sympathetic stimulation? | constriction of the bronchioles decreased secretion of the pancreas constriction of the urinary sphincters dilation of skeletal muscle blood vessels Answer: constriction of the bronchioles |
| The _____ is an extension of the great toe, with or without fanning of the other toes, in response to stimulation of the outer margin of the sole of the foot. | Babinski sign |
| Another name for the parasympathetic nervous system is the nervous system. | craniosacral |
| Which cranial nerve is responsible for the sense of smell? | olfactory |
| The somatic motor system includes all the _____ motor pathways _____ the CNS. | voluntary; within |
| The cortex is capable of storing and retrieving information from both short-term and long-term | Memory |
| Axon terminals of autonomic neurons release either of two neurotransmitters, | norepinephrine and acetylcholine. |
| Acetylcholine binds to _____ receptors. | cholinergic |
| A _____ is a skeletal muscle or group of muscles that receives motor axons from a given spinal nerve. | Myotome |
| “Fight or flight” physiological changes include all of the following EXCEPT | increased conversion of glycogen to glucose. constriction of respiratory airways. increased perspiration. dilation of blood vessels in skeletal muscles. Answer: constriction of respiratory airways |
| A reflex consists of either a muscle contraction or a | muscle stretch. muscle relaxation. glandular secretion. glandular excretion. Answer: glandular secretion |
| The set of coordinated commands that control the programmed muscle activity mediated by extrapyramidal pathways is called the | motor program |
| Tongue movement is controlled by which cranial nerve? | hypoglossal |
| The reticular activating system maintains | consciousness |
| Each skin surface area supplied by sensory fibers of a given spinal nerve is a | Dermatome |
| The two main types of adrenergic receptors are | Alpha and Beta |
| Mixed cranial nerves contain axons of | Sensory and Motor neurons |
| Which of the following is NOT correct? | Sympathetic preganglionic axons pass along the dorsal root of certain spinal nerves. |
| The _____ consists of several structures that lie beneath the thalamus and form the floor of the third ventricle and the lower part of its lateral walls. | Hypothalamus |
| The action of acetylcholine is quickly terminated by its being hydrolyzed by the enzyme | acetylcholinesterase |
| Both sympathetic and parasympathetic divisions are tonically active, which means they | continually conduct impulses to autonomic effectors. |
| Which region of the brain plays a part in the mechanism responsible for emotions by associating sensory impulses with feelings of pleasantness and unpleasantness? | Thalamus |
| The _____ nerve transmits impulses that result in sensations of equilibrium. | Vestibular |
| Many cerebral functions have typical locations. This fact is known as | cerebral localization |
| The part of the brain that can directly influence or inhibit the release of hormones from the pituitary is the: | hypothalamus |
| Somatic motor and autonomic pathways share all of the following characteristics except: | number of neurons between central nervous system (CNS) and effector. |
| Which is(are) the neurotransmitter(s) in a somatic motor pathway? | Acetylcholine |
| All of the following cranial nerves are involved in proprioception except the: | vagus |
| Once inside the sympathetic chain ganglion, the preganglionic fiber may: | synapse with a sympathetic postganglionic neuron. send ascending and/or descending branches through the sympathetic trunk to synapse with postganglionic neurons in other chain ganglia. pass through one or more ganglia without synapsing. do all of th |
| How does a dually innervated autonomic effector differ from a singly innervated autonomic effector? | A dually innervated effector receives input from both sympathetic and parasympathetic pathways. A singly innervated autonomic effector receives input from only the sympathetic division. |
| Parasympathetic stimulation has no effect on any of the following areas except: | sweat glands |
| Norepinephrine is liberated at: | most sympathetic postganglionic nerve endings |
| The parasympathetic and sympathetic divisions always act with a cooperative influence, and through summation of the impulses, the effect can be increased. | False |
| A child was frightened by a large dog. The pupils of the child’s eyes became dilated, and the heart and respiratory rates increased. These symptoms were caused by stimulation of: | the sympathetic nervous system. |
| Danielle has sustained an injury that has reduced her ability to complete simple tasks such as lifting a pencil, manipulating eating utensils, and brushing her hair. The injury has affected the _____ motor pathways _____ the central nervous system (CNS). | voluntary; outside |
| If the dorsal root ganglia of the spinal nerve were destroyed, a person would lose _____ related to that pathway. | Sensory perception |
| Conduction by the sixth cranial nerve results in sensations of hearing. | False |
| Which of the following is not an example of sympathetic stimulation? | Constriction of the bronchioles |
| All of the following are examples of parasympathetic stimulation except: | increased heart rate |
| Biofeedback involves willful control of specific effectors normally controlled only autonomically. | True |
| The cerebellum acts with the _____ to produce skilled movement. | Cerebrum |
| Most effectors of the autonomic nervous system are dually innervated by sympathetic and parasympathetic neurons | True |
| Which of the following is not associated with the oculomotor nerve? | Closing and opening of the eye (blink reflex) |
| Nerves that innervate the floor of the pelvic cavity and some of the surrounding areas are found in the _____ plexus. | coccygeal |
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prispeguero
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