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Worksheets

Nervous System and Nervous Tissue

Total questions: 40

Worksheet time: 20mins

Name
Class
Date
1.

The nervous system has two principal divisions, the central nervous system and the ____.

a)

peripheral nervous system

b)

somatic nervous system

c)

parietal nervous system

d)

lateral nervous system

2.

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

a)

efferent

b)

afferent

c)

inter

d)

sensory

3.

Sacs that store chemicals in the axon terminals are synaptic ____.

a)

vesicles

b)

receptors

c)

ion channels

d)

enzymes

4.

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

a)

myelin

b)

nervous

c)

glial

d)

astrocyte

5.

The neurons in the walls of the organs of the digestive system form _______.

a)

enteric plexuses

b)

ganglia

c)

nuclei

d)

tracts

6.

The gaps in the myelin sheath along axons are called _____.

a)

nodes of Ranvier

b)

saltatory nodes

c)

myelin gaps

d)

synapses

7.

The sodium-potassium pump is a(n) _______ transport mechanism.

a)

active

b)

passive

c)

diffusion

d)

osmosis

8.

-70 mV is the continuous voltage in neurons during _______ membrane potential.

a)

resting

b)

threshold

c)

depolarization

d)

repolarization

9.

The critical level of depolarization that has to be reached for an action potential to occur is the _______.

a)

resting potential

b)

threshold potential

c)

depolarization

d)

repolarization

e)

hyperpolarization

10.

When the polarity of a membrane becomes more negative than the resting membrane potential, the membrane is considered to be ____.

a)

depolarized

b)

repolarized

c)

hyperpolarized

d)

at threshold potential

11.

The type of impulse conduction in myelinated fibers is called ____.

a)

saltatory

b)

continuous

c)

synaptic

d)

myelinated

12.

The neuron before a synapse is a(n) ____ neuron.

a)

presynaptic

b)

postsynaptic

c)

motor

d)

inhibitory

13.

The chemicals stored in synaptic vesicles are referred to as ____.

a)

neurotransmitters

b)

hormones

c)

enzymes

d)

ions

14.

A nerve cell is turned on completely or not at all. This is known as

a)

the all-or-none principle

b)

saltatory conduction

c)

continuous conduction

d)

temporal summation

15.

Channels that open in response to a change in the membrane potential are _______ ion channels.

a)

voltage-gated

b)

leakage

c)

sodium-potassium pump

d)

ligand-gated

16.

A neuron with a voltage of -55 mV is at the ____________ potential.

a)

resting

b)

threshold

c)

depolarized

d)

repolarized

17.

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

a)

efferent

b)

afferent

c)

inter

d)

sensory

18.

Which of the following is an example of an effector?

a)

glands

b)

bones

c)

skin

d)

cartilage

19.

The portion of the nervous system that is considered involuntary is the

a)

autonomic nervous system

b)

somatic nervous system

c)

central nervous system

d)

peripheral nervous system

20.

Compared to unmyleninated axons, myelinated axons conduct impulses

a)

faster

b)

slower

c)

more often

d)

less often

21.

The neuroglial cell involved in the blood brain barrier is the

a)

astrocyte

b)

oligodendrocyte

c)

Schwann cell

d)

satellite cell

22.

Depolarization of a membrane is begins with the

a)

opening of sodium channels

b)

opening of potassium channels

c)

opening of calcium channels

d)

closing of sodium channels

23.

The junction between two nerve cells is called a

a)

synapse

b)

neuromuscular junction

c)

node of Ranvier

d)

myelin sheath

24.

Which ion triggers the release of the neurotransmitter into the synaptic cleft?

a)

sodium

b)

potassium

c)

calcium

d)

chloride

25.

What is the effect of inhibitory neurotransmitters on the postsynaptic membrane?

a)

depolarization

b)

hyperpolarization

c)

reaching threshold potential

d)

no effect

26.

Which of the following provides myelin for axons in the CNS?

a)

oligodendrocytes

b)

Schwann cells

c)

astrocytes

d)

ependymal cells

27.

When a neuron is depolarized:

a)

both Na+ and K+ are inside the membrane.

b)

the Na+ is inside and the K+ is outside the membrane.

c)

the Na+ is outside and the K+ is inside the membrane.

d)

the Na+ and K+ are outside the membrane.

28.

The __ nervous system only contains all the sensory neurons and the voluntary motor neurons.

a)

somatic

b)

autonomic

c)

enteric

d)

central

29.

The time during which the neuron cannot generate another action potential.

a)

refractory period

b)

latent period

c)

threshold period

d)

resting period

30.

Also called a nerve impulse.

a)

action potential

b)

synapse

c)

myelin sheath

d)

hyperpolarization

31.

An increase in the negativity of the membrane potential.

a)

hyperpolarization

b)

depolarization

c)

repolarization

d)

threshold potential

32.

Collection of myelinated nerve fibers in the CNS.

a)

nerve

b)

tract

c)

nucleus

d)

ganglion

33.

A collection of nerve cell bodies in the PNS that relays nerve signals.

a)

ganglion

b)

nucleus

c)

tract

d)

cortex

34.

A process that carries impulses to the cell body of a neuron.

a)

dendrite

b)

axon

c)

soma

d)

synapse

35.

A process that carries nerve impulses away from the cell body.

a)

dendrite

b)

axon

c)

soma

d)

synapse

36.

Which of the following provides myelin for axons in the PNS?

a)

oligodendrocytes

b)

Schwann cells

c)

astrocytes

d)

satellite cells

37.

Nerve cells that integrate information in the CNS are ____ neurons.

a)

efferent

b)

afferent

c)

inter

d)

sensory

38.

Which of the following produces cerebrospinal fluid (CSF)?

a)

oligodendrocytes

b)

Schwann cells

c)

astrocytes

d)

ependymal cells

39.

Repolarization begins with the opening of _____ channels.

a)

sodium

b)

potassium

c)

chloride

d)

calcium

40.

Which ion produces hyperpolarization when it enters a neuron?

a)

sodium

b)

potassium

c)

calcium

d)

chloride