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WorksheetsIDC4U1 Action Potential
Total questions: 11
Worksheet time: 6mins
Name
Class
Date
1.
When the neuron is in a resting state it is more negative inside compared to the outside.
a)
True
b)
False
2.
What number on the graph represents the Depolarization phase?
a)
1
b)
2
c)
3
d)
4
3.
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
4.
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
5.
A membrane potential becoming less negative is called
a)
hyperpolarization
b)
depolarization
c)
repolarization
d)
polarization
6.
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
7.
Depolarization occurs when
a)
sodium channels open
b)
potassium channels open
c)
sodium channels close
d)
potassium channels close
8.
Neurotransmitters are released from the
a)
Dendrites
b)
Post-synaptic neuron
c)
Presynaptic neuron
d)
Axon
9.
Z
a)
Dendrite
b)
Axon Terminal
c)
Neurotransmitters
d)
Synapse
10.
X
a)
Axon Terminal Button
b)
Neurotransmitters
c)
Dendrite
d)
Synapse
11.
What causes sodium ion channels on the postsynaptic membrane to open?
a)
arrival of an action potential at the channel
b)
enzymatic digestion of the neurotransmitter bound to the channel
c)
binding of the neurotransmitter to the channel itself
d)
binding of calcium ions to the channel itself
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