Chapter 9 Nerve Test Practice

Question 1

How many cranial nerves are there? Pairs-

Answer 1

24
12

Question 2

A terminal bouton is found

Answer 2

At the end of the telodendron

Question 3

The parasympathetic nervous system nerves are also known as the

Answer 3

cranial-sacral system

Question 4

White matter is made up of

Answer 4

myelinated axons

Question 5

The period during which a neuron has generated a nerve impulse cannot generate another is called the

Answer 5

refractory period

Question 6

nerve fibers is another name for

Answer 6

axons

Question 7

the fight-or-flight response to an emergency situation is a specific function of the

Answer 7

sympathetic nervous system

Question 8

The most primitive part of the CNS is the

Answer 8

brainstem

Question 9

the space between a neuron and a target cell is called a

Answer 9

synapse

Question 10

The largest part of the brain is the

Answer 10

cerebrum

Question 11

The hole running through the center of the spinal column is the

Answer 11

central canal

Question 12

saltatory conduction occurs when a nerve impulse

Answer 12

travels from one node of Ranvier to the next node

Question 13

In the spinal cord the small gaps in the myelin sheath between adjacent glial cells are called

Answer 13

nodes of Ranvier

Question 14

In a healthy animal, if you shine a light in one eye what should happen?

Answer 14

the pupils of both eyes should constrict

Question 15

The part of the CNS that contains the corpus callosum is the

Answer 15

cerebrum

Question 16

What keeps many drugs from readily passing from the blood into the brain?

Answer 16

blood-brain barrier

Question 17

Afferent nerve fibers carry sensations

Answer 17

Towards the CNS

Question 18

The radiographic procedure that uses a radiopaque dye injected into the space just beneath the arachnoid membrane to highlight areas of spinal cord compression is

Answer 18

myelography

Question 19

Which cranial nerve is responsible for perception of light and vision?

Answer 19

CN II

Question 20

Which clinical sign is characteristic of the parasympathetic nervous system stimulation?

Answer 20

reduced heart rate

Question 21

The basic, functional units of the nervous system are

Answer 21

neurons

Question 22

Many excitatory neurotransmitters usually cause __ influx so that the postsynaptic membrane moves toward threshold and depolarization can begin a new nerve impulse.

Answer 22

sodium ion

Question 23

The connective tissue layer that lies directly on the surface of the brain and spinal cord is the

Answer 23

pia mater

Question 24

The medulla oblongata is part of the

Answer 24

brainstem

Question 25

The part of the CNS that controls coordinated movement, balance, and posture is the

Answer 25

cerebellum

Question 26

What three clinical signs are characteristic of the sympathetic nervous system stimulation

Answer 26

reduced digestion, bronchodilation, and vasodilation

Question 27

Define oligodendrocyte

Answer 27

a cell whose membrane is the myelin sheath in the brain and spinal cord.

Question 28

What does the schwann cell produce and where

Answer 28

It produces the myelin in the spinal cord

Question 29

A reflex arc originates from the/a

Answer 29

sensory receptor (all reflexes start from here)

Question 30

Gyri and sulci are found on the surface of the

Answer 30

cerebrum and cerebellum. Gyri are folds, and sulci are grooves.

Question 31

A depolarized neuron has

Answer 31

high potassium and high sodium ion concentration inside the cell membrane

Question 32

An example of an action controlled by the somatic nervous system is

Answer 32

turning the head

Question 33

When the patellar ligament is tapped, what type of reflex causes the quadriceps muscle to contract, producing a small kick?

Answer 33

Stretch reflex

Question 34

Which one of the following cranial nerves is a pure sensory nerve?

Answer 34

CN I and CN II

Question 35

The part of the CNS that contains the hypothalamus is the

Answer 35

diencephalon

Question 36

What are three examples of an action controlled by the autonomic nervous system

Answer 36

release of digestive juices, lowering the blood pressure, increasing the heart rate

Question 37

The “all-or-nothing” principle means

Answer 37

Neuron depolarizes to its full strength or it doesnt

Question 38

Which clinical sign is characteristic of the parasympathetic nervous system stimulation?

Answer 38

reduced heart rate

Question 39

The three catecholamine neurotransmitters are

Answer 39

norepinephrine, epinephrine, and dopamine.

Question 40

What is the result of a normal palpebral reflex?

Answer 40

A light tap on the medial canthus of the eye produces a blink of its eyelid.

Question 41

Many neurotransmitters are broken down by

Answer 41

enzymes

Question 42

A somatic reflex involves

Answer 42

skeletal muscle contraction

Question 43

What type of reflex causes the extensor muscles on one limb to contract when the flexor muscles on the opposite limb contract?

Answer 43

crossed extensor reflex

Question 44

Hypermetria results from injury to the

Answer 44

cerebellum

Question 45

Which one of the following neurotransmitters is inhibitory only?

Answer 45

gamma-aminobutyric acid

Question 46

A polarized neuron in its resting state has

Answer 46

high sodium ion concentration on the outside of the cell membrane and high potassium ion concentration on the inside of the cell membrane.

Question 47

The centers of higher learning and intelligence are found in the

Answer 47

cerebrum

Question 48

The primary neurotransmitter of the parasympathetic nervous system is

Answer 48

acetylcholine.

Question 49

The stretch reflex is an example of a

Answer 49

monosynaptic ipsilateral reflex arc

Question 50

nerve cells receive stimulus or impulses from

Answer 50

dendrites

Question 51

A ganglion is a

Answer 51

cluster of neuronal cell bodies outside the CNS.