Week 8 physiology
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| If the dorsal root ganglia of the spinal nerve were destroyed, a person would lose _____ related to that pathway. | sensory perception
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| Which is not true of the dorsal nerve root? | t is also called the posterior root.
It includes the spinal ganglion.
It includes sensory fibers.
Correct!
All of the above are true.
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| Which of the following statements is not true? | The major function of the parasympathetic division is to serve as an “emergency” system.
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| Somatic motor and autonomic pathways share all of the following characteristics except: | number of neurons between central nervous system (CNS) and effector.
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| Most effectors of the autonomic nervous system are dually innervated by sympathetic and parasympathetic neurons. True or False | True
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| Impulses sent over which of the following tracts could result in voluntary movement, especially of the hands, fingers, feet, and toes of the opposite side? | Lateral corticospinal
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| Norepinephrine is liberated at: | most sympathetic postganglionic nerve endings.
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| Acetylcholine can stimulate _____ receptors. | nicotinic
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| Which of the following is not true of the knee jerk reflex? | It is a flexor reflex.
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| A mixed nerve is one that: | carries both sensory and motor fibers.
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| Tic douloureux is a painful neuralgia of the _____ nerve. | trigeminal
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| Normal infants will show the Babinski reflex up to the age of _____ years. | 1.5-2
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| Which of the following is a description of the principle of autonomic antagonism as it relates to the autonomic nervous system? | If sympathetic impulses tend to stimulate an effector, parasympathetic impulses tend to inhibit it.
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| The knee jerk can be classified as a segmental reflex because: | impulses that mediate it enter and leave the same segment of the cord.
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| The cerebellum performs all of the following functions except: | controls cardiac function.
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| Which of the following is not associated with the oculomotor nerve? | Closing and opening of the eye (blink reflex)
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| The spinal tract that is located in the side of the cord, originates in the brain, and terminates in the spinal cord is the _____ tract. | lateral corticospinal
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| Cerebrospinal fluid circulates through the ventricles, into the central canal and _____, and is absorbed back into the blood. | subarachnoid space
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| Which of the following is a correct statement? | There are 5 lumbar nerve pairs.
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| 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.
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| Sympathetic responses generally have widespread effects on the body because: | preganglionic fibers synapse with several postsynaptic fibers.
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| The vomiting reflex is mediated by the: | medulla
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| The parasympathetic and sympathetic divisions always act with a cooperative influence, and through summation of the impulses, the effect can be increased. True or False | False
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| 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.
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| Which is the only plexus that contains fibers from the thoracic region of the spinal cord? | Brachial
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| 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.
Correct!
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| If the ventral nerve root of a spinal nerve were destroyed, a person would lose _____ related to that pathway. | willed movement
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| Propranolol is an example of a: | Beta Blocker, Drug used to treat irregular heartbeats, drug used to treat hypertension ( all of the above)
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| Impulses from the _____ play a part in arousing or alerting the cerebrum. | thalamus
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| Which of the following is not a function of the hypothalamus? | Regulation of motor activity
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| Damage to the _____ nerve could make the diaphragm unable to function. | phrenic
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| 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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| The preganglionic neurons of both the sympathetic and the parasympathetic divisions are cholinergic. True or False | True
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| Cerebrospinal fluid is formed by filtration of blood in the: | choroid plexuses.
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| Which of the following is not an example of sympathetic stimulation? | Constriction of the bronchioles
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| The part of the brain that can directly influence or inhibit the release of hormones from the pituitary is the: | hypothalamus
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| Which of the following is not true? | One bundle of nerve fibers (nerve roots) projects from each side of the spinal cord.
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| All of the following cranial nerves are involved in proprioception except the: | vagus
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| Audition is a function of the _____ lobe. | temporal
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| Afferent nerves or fibers are found only in the _____ nervous system. | Sensory and Autonomic
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| Nerve impulses over the _____ nerve cause increased peristalsis and decreased heart rate. | vagus
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| All of the following are examples of parasympathetic stimulation except: | increased heart rate.
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| Which is(are) the neurotransmitter(s) in a somatic motor pathway? | Acetylcholine
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| The cerebellum acts with the _____ to produce skilled movement. | cerebrum
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| The part of the brain that assists in the maintenance of balance is the: | cerebellum
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