Nervous System

Question 1

The nervous system and the ______ system share the greatest responsibility for maintaining homeostasis.

Answer 1

B. Endocrine

Question 2

Neurons that conduct nerve impulses from the receptors to the central nervous system are

Answer 2

D. Sensory neurons

Question 3

Processes that carry impulses to another neuron are

Answer 3

B. Axons

Question 4

Which of the following is an example of an effector?

Answer 4

E. Glands

Question 5

The neuroglia that produce myelin in the peripheral nervous system are

Answer 5

E. Schwann cells

Question 6

Groups of neuron cell bodies in the peripheral nervous system are called

Answer 6

E. Ganglion

Question 7

A disorder of the central nervous system would involve the

Answer 7

E. Brain and spinal cord

Question 8

Compared to unmyelinated axons, myelinated axons

Answer 8

A. Conduct impulses faster

Question 9

The ability of nerve cells to respond to stimuli and to convert them into nerve impulses is called

Answer 9

C. Excitability

Question 10

Saltatory conduction refers to the conduction impulses in

Answer 10

D. Myelinated neurons

Question 11

Depolarization of a membrane is due to the

Answer 11

B. Opening of sodium channels

Question 12

The stage in an action potential that immediately follows depolarization is

Answer 12

C. Restoration

Question 13

The period of time during which neuron cannot generate another action potential is called

Answer 13

D. Refractory period

Question 14

A group of nerve fibers in the central nervous system is called a

Answer 14

C. Tract

Question 15

A stimulus strong enough to generate a nerve impulse is called

Answer 15

A. Threshold stimulus

Question 16

The speed of nerve impulse conduction is determined by all of the following except

Answer 16

E. Synaptic strength

Question 17

The junction between two nerve cells is called

Answer 17

D. Synapse

Question 18

Neurotransmitters are stored in

Answer 18

B. Synaptic vesicles

Question 19

Neurotransmitters are released at the

Answer 19

Axons terminal

Question 20

Which of the following provides myelin for axons in the central nervous system?

Answer 20

Oligodendrocytes

Question 21

Processes that receive impulses and conduct them toward the cell body are

Answer 21

A. Dendrites

Question 22

Which of the following is an inhibitory neurotransmitter?

Answer 22

E. Serotonin

Question 23

The nervous system has two principal divisions, the _____ and the ________

Answer 23

Central nervous system and peripheral nervous system

Question 24

Nerve cells that conduct impulses from the central nervous system to muscles and glands are ____ neurons

Answer 24

Efferent

Question 25

Sacs that store chemicals in the axon terminals area ______

Answer 25

Synaptic vesicles

Question 26

A covering around axons, which is produced by neuroglia, is called ____

Answer 26

Myelin

Question 27

The gaps in the myelin sheath along axons are called ___

Answer 27

Nodes

Question 28

The type of impulse conduction in myelinated fibers is called ____

Answer 28

Saltatory conduction

Question 29

The neuron before a synapse is a _____ neuron, the neuron located after a synapse is a _______

Answer 29

Presynaptic, postsynaptic

Question 30

Axons terminals end in bulb-like structures called ______

Answer 30

Synaptic knob

Question 31

Large diameter fibers conduct impulses ____ than small diameter fibers

Answer 31

Stronger

Question 32

The chemicals stored in synaptic vesicles are referred to as _____

Answer 32

Neurotransmitters

Question 33

The space between the Presynaptic and postsynaptic neuron is called

Answer 33

Synaptic cleft

Question 34

A progressive destruction of the myelin sheaths of neurons in the CNS is ______

Answer 34

X