Deck 8 (MR): The Nervous System

Question 1

Which of the following statements are true of the nervous system (Select all that apply)?

A)The CNS consists of the brain and spinal cord.
B)Movement and sensation are functions of this system.
C)The nervous system regulates body functions by means of electrochemical impulses.
D)Only the brain is protected by bone.
E)The autonomic nervous system is a special subdivision of the CNS.
F)The PNS consists of cranial nerves and spinal nerves.

Answer 1

A,B,C,F

Question 2

Which of the following statements are true of the parts of the cerebrum (Select all that apply)?

A)Conscious muscle sense is felt in the temporal lobes.
B)The centers for vision are in the frontal lobes,right behind the eyes.
C)The parietal lobes contain the motor areas for voluntary movement.
D)The centers for hearing are in the occipital lobes,right behind the ears.
E)The innermost part of the cerebrum is the cerebral cortex.
F)Accessory movements are regulated by the basal ganglia.

Answer 2

F

Question 3

Which of the following statements are true of spinal nerves (Select all that apply)?

A)Each spinal nerve has a dorsal,or motor,root and a ventral,or sensory,root.
B)Most spinal nerves are mixed nerves.
C)The phrenic nerves are motor to the diaphragm.
D)The sciatic nerve supplies the thumb side of the hand.
E)A dorsal root ganglion consists of the cell bodies of motor neurons.
F)The pairs of spinal nerves are 8 cervical,12 thoracic,5 lumbar,5 sacral,and one coccygeal.

Answer 3

B,C,F

Question 4

Which of the following statements are true of a nerve impulse (Select all that apply)?

A)Depolarization is the reversal of charges on either side of the neuron membrane.
B)The entry of Na+ ions brings about depolarization of a neuron.
C)During repolarization,the negative charge is restored to the outside of the neuron membrane.
D)The entry of K+ ions brings about repolarization.
E)An action potential is polarization followed by depolarization.
F)The maximum speed of a nerve impulse is about 2 feet per second.

Question 5

Which of the following statements are true of the meninges (Select all that apply)?

A)The pia mater directly lines the brain.
B)The dura mater is made of elastic connective tissue.
C)The arachnoid membrane is made of dense fibrous connective tissue.
D)The subarachnoid space is between the arachnoid membrane and the dura mater.
E)The meninges contain cerebrospinal fluid and provide a cushion for the brain.
F)The meninges line both the brain and spinal cord.
G)The meningeal sac that hangs below the spinal cord is the site of a lumbar puncture.
H)The cranial dura mater has two layers and the spinal dura mater has three layers.

Question 6

Which of the following statements are true of the cranial nerves (Select all that apply)?

A)The accessory nerves are motor to the shoulders.
B)The acoustic nerves are sensory only for hearing.
C)The optic nerves are sensory for vision and motor for blinking.
D)Secretion of saliva is a function of the facial and glossopharyngeal nerves.
E)The olfactory nerves are sensory for smell.
F)The trochlear nerves are motor for movement of the eyeball.
G)The vagus nerves help increase heart rate and the process of digestion.
H)The oculomotor nerves help regulate the size of the pupil.

Question 7

Which of the following statements are true of the sympathetic division of the autonomic nervous system (Select all that apply)?

A)Its other name is thoracolumbar.
B)It dominates in stressful situations.
C)Its only transmitter is acetylcholine.
D)Most of its ganglia are in two chains near the backbone.
E)It increases heart rate and dilates the bronchioles.
F)It stimulates the liver to change glucose to glycogen.
G)It causes vasoconstriction in skin and viscera.
H)It increases digestion so that food is available for energy.

Question 8

Which of the following statements are true of the cranial nerves (Select all that apply)?

A)Dilation of the bronchioles is a function of the vagus nerves.
B)Equilibrium is a function of the acoustic nerves.
C)The abducens nerves are motor for movement of the eyeball.
D)The sensory nerves for the teeth are the facial nerves.
E)The hypoglossal nerves are sensory for taste.f.The trigeminal nerves are motor to the masseter muscles,for chewing.

Question 9

Which of the following statements are true of neurons (Select all that apply)?

A)Sensory neurons carry impulses from the CNS to receptors.
B)A group of neuron axons in the PNS is called a nerve.
C)Interneurons are found only in the spinal cord.
D)Motor neurons may also be called afferent neurons.
E)A single neuron can be both sensory and motor.
F)The part of a neuron that carries the electrical impulse is the cell membrane.

Question 10

Which of the following statements are true of the functions of the brain (Select all that apply)?

A)Regulation of appetite is a function of the hypothalamus.
B)Heart rate is regulated by the pons.
C)The midbrain and medulla share the regulation of respiration.
D)Visual reflexes are controlled by the pons.
E)Body temperature is regulated by centers in the medulla.
F)Keeping the body upright is controlled by the cerebellum and medulla.

Question 11

Which of the following statements are true of the parts of the cerebrum (Select all that apply)?

A)Learning a sequential task is a function of the parietal lobes.
B)The cutaneous senses are felt and interpreted in the parietal lobes.
C)The hippocampus provides motor impulses for CNS reflexes.
D)The cerebral hemispheres are connected by the corpus callosum.
E)The cerebral cortex is the white matter of the hemispheres.
F)The centers for the sense of smell are in the frontal lobes,right above the nose.

Question 12

Which of the following statements are true of the parasympathetic division of the autonomic nervous system (Select all that apply)?

A)Its other name is cervicalsacral.
B)It dominates in nonstressful situations.
C)Its neurotransmitters are acetylcholine and norepinephrine.
D)Its ganglia are near or in the visceral effectors.
E)It promotes normal urination and defecation.
F)It constricts the pupils of the eyes.
G)It causes vasodilation in skeletal muscles.
H)It slows digestion to conserve energy.

Question 13

Which of the following statements are true of the spinal cord (Select all that apply)?

A)The white matter consists of ganglia.
B)The gray matter is shaped like the letter A.
C)It extends from the foramen magnum to the next to last thoracic vertebra.
D)The central canal contains cerebrospinal fluid.
E)Both the meninges and the backbone provide protection from mechanical injury.
F)The ventral horns of the gray matter consist of the cell bodies of motor neurons.

Question 14

Which of the following statements are true of a reflex arc (Select all that apply)?

A)Interneurons may be present in the CNS.
B)A sensory neuron carries impulses to the CNS.
C)The stimulus for the reflex is detected by a receptor.
D)Synapses in the reflex arc are in the dorsal root ganglia.
E)The effector of the reflex is often muscle tissue.f.The effector is activated by impulses from a motor neuron.

Question 15

Which of the following statements are true of nerve tissue (Select all that apply)?

A)The myelin sheath provides electrical insulation.
B)Astrocytes contribute to the blood-brain barrier.
C)Synaptic transmission requires rapid electrical impulses.
D)Myelin is produced by Schwann cells in the PNS and microglia in the CNS.
E)An axon carries impulses toward the cell body of a neuron.
F)The function of an inactivator is to inactivate an electrical impulse when it is no longer needed.

Question 16

Which of the following statements are true of cerebrospinal fluid (CSF)(Select all that apply)?

A)CSF is made from blood plasma by the process of diffusion.
B)The five ventricles of the brain all contain CSF.
C)CSF is reabsorbed into the blood from the ventricles.
D)The central canal of the spinal cord contains CSF.
E)The structures that form CSF are the choroid plexuses in the subarachnoid space. f.CSF is a circulating fluid,the tissue fluid of the CNS.

Question 17

Which of the following statements are true of the functions of the brain (Select all that apply)?

A)Muscle tone is regulated by the cerebellum.
B)Blood pressure is regulated by the hypothalamus.
C)Voluntary movement is coordinated by the cerebellum.
D)Auditory reflexes are regulated by the thalamus.
E)Unimportant sensations are suppressed by the hypothalamus.
F)The water content of the body is regulated by the medulla.

Question 18

Which of the following statements are true of stretch and flexor reflexes (Select all that apply)?

A)Stretch reflexes enable us to reach outward or upward very quickly.
B)Flexor reflexes enable us to pull away from harm.
C)Stretch reflexes are two-neuron reflexes in which a sensory neuron synapses directly with a motor neuron.
D)These are spinal cord reflexes that the brain cannot inhibit.
E)The patellar reflex is a flexor reflex that may be used clinically.
F)In a stretch reflex,a muscle that is stretched will contract.