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Nerve cells

Total questions: 42

Worksheet time: 24mins

Name
Class
Date
1.

The long, fiber like part of a neuron which the cell sends information to receiving neurons

a)

axon

b)

dendrite

c)

myelin

d)

Node of Ranvier

2.

The part of the neuron that receives messages from adjacent neurons

a)

axon

b)

axon terminal

c)

dendrite

d)

neuron

3.
This insulating material forms a layer, around the axon of a neuron.  It enables electrical signals to travel down the axon at higher speeds.
a)
neuron
b)
myelin sheath
c)
dendrite
d)
neurotransmitter
4.
A chemical produced by neurons that carries messages to other neurons
a)
myelin sheath
b)
neurotransmitter
c)
axon
d)
axon terminal
5.
The tiny gap between neurons where nerve impulses are sent from one neuron to another.  It is where communication occurs between an axon and dendrite
a)
synapse
b)
axon terminal
c)
impulse
d)
myelin
6.

Identify #1

a)

axon

b)

cell body

c)

myelin sheath

d)

nucleus

7.

Identify #2

a)

axon

b)

cell body

c)

dendrite

d)

myelin sheath

8.

Identify #3

a)

axon

b)

cell body

c)

dendrite

d)

myelin sheath

9.

Identify #6

a)

axon terminals

b)

dendrites

c)

dendrite

d)

schwann cells

10.

Myelin, an insulating material, is found in

a)

cell bodies

b)

dendrites

c)

axon terminals

d)

Schwann cells

11.

Gaps between Schwann cells that increase the speed of the transmission of the signal down the neuron are called

a)

axon terminals

b)

dendrites

c)

myelin

d)

nodes of Ranvier

12.
What type of neuroglial cell attaches neurons to capillaries?
a)
Astrocyte
b)
Oligodendrocytes
c)
Microglial
d)
Ependymal
13.
The function of the ependymal cells is ___________.
a)
Protection of the delicate neuron axon
b)
Maintain the health of the neuron
c)
Circulates the cerebrospinal fluid
d)
Insulate the electrical impulse
14.
What is the main function of oligodendrocytes?
a)
Production of insulation and protection
b)
Maintain the health of the neuron
c)
Brace and support the neuron to it's nurtient supply
d)
Lining of the central cavities to circulate spinal fluid
15.

Neuroglial cells that form the fatty myelin sheath on neurons in the CNS are ___________ in the PNS are ________________?

a)

ganglia and oligodendroglia

b)

astrocytes and schwann cells

c)

schwann cells and oligodendroglia

d)

oligodendroglia and schwann cells

16.

Small cells that engulf and destroy microbes and cellular debris in the CNS

a)

microglia

b)

horns

c)

neuroglia

d)

astrocytes

17.

Produce cerebrospinal fluid in the brain & spinal cord

a)

ependymal cells

b)

oligodendrocytes

c)

microglia

d)

astrocytes

18.

Cells that form myelin sheaths on PNS

a)

astrocytes

b)

oligodendrocytes

c)

microglia

d)

Schwann cells

19.

Which type of cell is circled?

a)

Microglia

b)

Astrocytes

c)

Oligodendrocytes

d)

Satellite cells

20.

Which type of cell is circled?

a)

Oligodendrocytes

b)

Satellite cells

c)

Astrocytes

d)

Ependymal cells

21.
When a neuron is depolarized, what are the first channels to open?
a)
Sodium
b)
Potassium
c)
Calcium
d)
ACTH
22.
When a neuron is resting, the inside of the axon has a ____________ charge.
a)
positive
b)
negative
23.
Which ions are involved in the electrical nerve impulse?
a)
Iodine and Sodium
b)
Potassium and Sodium
c)
Iron and Sodium
d)
Calcium and Iodine
24.

When a neuron is at REST,

a)

the inside of the neuron is negatively charged compared to the outside.

b)

the inside of the neuron is positively charged compared to the outside.

c)

there is no charge difference established

d)

none of these is true

25.

Depolarization occurs when

a)

sodium channels open

b)

potassium channels open

c)

sodium channels close

d)

potassium channels close

26.
Z
a)
Dendrite
b)
Axon Terminal
c)
Neurotransmitters
d)
Synapse
27.

calcium is responsible for

a)

signaling the release of the neurotransmitter

b)

signaling Na to be released into the membrane

c)

signaling the release of K out of the membrane

d)

serving as the neurotransmitter

28.

all are factors in the speed of action potential EXCEPT

a)

diameter of the axon

b)

the state of the myelin sheath on the axon

c)

temperature

d)

length of the axon

29.

when does the stimuli cause an action potential?

a)

when it reaches threshold

b)

just below the threshold

c)

just above threshold

30.

What value is the resting potential in mV (number and sign only)?

(a)  

31.

A myelinated nerve fibre will have the ability to

a)

conduct impulses faster

b)

regenerate

c)

both

32.

During an action potential the membrane potential goes from the resting potential (typically -70 mV) to some positive value (typically about (a)   ) in a very short period of time (just a few milliseconds).

33.

The sodium potassium pump...

a)

is energy (ATP) free as sodium and potassium move in and out by diffusion as needed

b)

moves 3 sodium ions into the neuron and 3 potassium out only if ATP is present

c)

moves 3 sodium in to the neuron and 2 potassium without energy from ATP

d)

moves 3 sodium out of the neuron and 2 potassium into the neuron only if there is energy from ATP

34.
What number(s) on the graph represents the Resting Potential?
a)
1 and 2
b)
1 and 5
c)
2 and 3
d)
3 and 4
35.
A membrane potential becoming less negative is called
a)
hyperpolarization
b)
depolarization
c)
repolarization
d)
polarization
36.
What number on the graph represents the Depolarization phase?
a)
1
b)
2
c)
3
d)
4
37.
What number on the graph represents the Hyperpolarization phase?
a)
1
b)
2
c)
3
d)
4
38.
Why is -55 mV a significant number?
a)
This is the largest charge achieved during an action potential
b)
This is the threshold required to complete an action potential
c)
This is the resting charge of a neuron
d)
This is the charge when all the sodium is inside the cell
39.

What number(s) on the graph represents the THRESHOLD level of stimulus?

a)

1 and 5

b)

2

c)

3

d)

6

40.

a)

Unipolar neuron

b)

Bipolar neuron

c)

Multipolar neuron

41.

a)

Unipolar neuron

b)

Bipolar neuron

c)

Multipolar neuron

42.

a)

Unipolar neuron

b)

Bipolar neuron

c)

Multipolar neuron