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2.1.3 / 2.1.4 - Neurons, Action Potential, Synapse

Total questions: 24

Worksheet time: 18mins

Name
Class
Date
1.

Match the following functions with the neuron structure

a)

Carries the message to its next destination

1.

Axon

b)

Contains the nucleus

2.

Soma (Cell Body)

c)

Receive incoming message

3.

Dendrites

d)

Contains the Schwann Cells and insulates the neuron

4.

Myelin Sheath

e)

Branching ends of the axon where neurotransmitters are stored

5.

Axon Terminals

2.

Match the following structures with their function

a)

Space between the axon terminal of one neuron to the dendrite of another

1.

Synapse / Synaptic Cleft

b)

An electrical signal used by neurons to transmit a message

2.

Action Potential

c)

Chemical Signaling molecules used to transmit signals from one cell to the next

3.

Neurotransmitter

3.
Question Image

Match the following

a)

A

1.

Myelin Sheath

b)

B

2.

Sensory Neuron

c)

C

3.

Nodes of Ranvier

d)

D

4.

Soma / Cell Body

e)

E

5.

Synapse

4.
Question Image

Match the following

a)

F

1.

Interneuron

b)

G

2.

Dendrites

c)

H

3.

Axon

d)

I

4.

Motor Neuron

5.
W
a)
Axon Terminal Button
b)
Neurotransmitters
c)
Dendrite
d)
Synapse
6.
Y
a)
Axon Terminal Button
b)
Neurotransmitters
c)
Dendrite
d)
Synapse
7.
-70 mV is the measure of a
a)
Threshold Potential
b)
Action Potential
c)
Resting Potential
d)
End Point Potential
8.
When a membrane potential reaches +30mV, ________ channels open, ________ occurs, and ________ channels close.
a)
Sodium, depolarization, potassium
b)
Potassium, depoloarization, sodium
c)
sodium, repolarization, potassium
d)
postassium, repolarization, sodium
9.
The area between the pre-synaptic cell and the post-synaptic cell is termed the synaptic cleft.
a)
True
b)
False
10.
The sodium-potassium pump is involved in establishing the resting membrane potential. 
a)
True
b)
False
11.
When a neuron is depolarized, what are the first channels to open?
a)
Sodium
b)
Potassium
c)
Calcium
d)
ACTH
12.
When a neuron is resting, the inside of the axon has a ____________ charge.
a)
-55 mV
b)
-70 mV
c)
40 mV
d)
-75 mV
13.
What number on the graph represents the Depolarization phase?
a)
1
b)
2
c)
3
d)
4
14.
What number on the graph represents the Hyperpolarization phase?
a)
1
b)
2
c)
3
d)
4
15.
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
16.
What number on the graph represents the Threshold phase
a)
1
b)
3
c)
4
d)
6
17.
What number on the graph represents the Repolarization phase?
a)
1
b)
2
c)
3
d)
4
18.

Z

a)

Axon Terminal Button

b)

Neurotransmitters

c)

Dendrite

d)

Synapse

19.

X

a)

Axon Terminal Button

b)

Neurotransmitters

c)

Dendrite

d)

Synapse

20.

What chemical is activated by the action potential in the presynaptic neuron that causes the vesicles containing neurotranmitters to move toward the synaptic cleft?

a)

calcium

b)

potassium

c)

sodium

d)

phosphorus

21.

The location of neurotransmitters

a)

axon terminals

b)

dendrites

c)

Schwann cells

d)

cell body

22.

5 shows ____ diffusing across the synaptic cleft.

a)

neurotransmitters

b)

calcium ions

c)

sodium ions

23.

6 shows ____ entering the pre-synaptic neuron

a)

neurotransmitters

b)

calcium ions

c)

sodium ions

24.

Reorder the following stages of a synapse

a)

Action potential reaches the axon terminals of the sending cell; Ca ions flow into axon of sending cell

b)

Ca ions entering the cell trigger vesicles to fuse with membrane, dumping neurotransmitters into synapse

c)

Neurotransmitters attach to receptor proteins on the membrane of the receiving cell

d)

Neurotransmitters re-enter the synapse and an action potential MAY be triggered in the receiving cell

1)
2)
3)
4)

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