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Nerve Impulse Sequence

Total questions: 15

Worksheet time: 7mins

Name
Class
Date
1.
part of a neuron that receives information from other neurons
a)
axon
b)
dendrites
c)
myelin sheath
d)
synapse
2.
a signal molecule that transmits nerve impulses across synapses
a)
neuron
b)
neurotransmitter
c)
nerve
d)
action potential
3.
When a neuron is depolarized, what are the first channels to open?
a)
Sodium
b)
Potassium
c)
Calcium
d)
ACTH
4.
When a neuron is resting, the inside of the axon has a ____________ charge.
a)
positive
b)
negative
5.
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
6.
What is the insulating membrane that surrounds parts of the axon that helps to protect & propagate action potential?
a)
Axon
b)
Dendrites
c)
Node of Ranvier
d)
Myelin Sheath
7.

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

8.

Depolarization occurs when

a)

sodium channels open

b)

potassium channels open

c)

sodium channels close

d)

potassium channels close

9.
Neurotransmitters are released from the
a)
Dendrites
b)
Post-synaptic neuron
c)
Presynaptic neuron
d)
Axon
10.
Z
a)
Dendrite
b)
Axon Terminal
c)
Neurotransmitters
d)
Synapse
11.
W
a)
Axon Terminal Button
b)
Neurotransmitters
c)
Dendrite
d)
Synapse
12.
X
a)
Axon Terminal Button
b)
Neurotransmitters
c)
Dendrite
d)
Synapse
13.

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

14.

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

15.

when does the stimuli cause an action potential?

a)

when it reaches threshold

b)

just below the threshold

c)

just above threshold