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WorksheetsAction potential
Total questions: 15
Worksheet time: 16mins
Name
Class
Date
1.
What is the normal resting potential of a neuron cell membrane?
a)
+40mV
b)
-30mV
c)
+55mV
d)
-70mV
2.
Which ions are involved in an action potential?
a)
Na; Cl
b)
Na; K
c)
K; Cl
d)
Na; Ca
3.
At which point on the diagram does depolarisation of the axon occur?
a)
A
b)
B
c)
C
d)
D
4.
The sodium potassium pump restores the resting potential. By which process does this work?
a)
Osmosis
b)
Diffusion
c)
Facilitated diffusion
d)
Active transport
5.
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
6.
When a neuron is not engaged in an impulse.
a)
Resting potential
b)
Action potential
c)
Neural potential
d)
Synaptic potential
7.
When a neuron is resting, the inside of the axon has a ____________ charge.
a)
positive
b)
negative
8.
A membrane potential becoming less negative is called
a)
hyperpolarization
b)
depolarization
c)
repolarization
d)
polarization
9.
In resting potential, neurons have more _________ on the outside of the cell membrane.
a)
K+
b)
NaCl
c)
Na+
d)
Cl-
10.
In resting potential, neurons have more ____________ on the inside of the cell membrane.
a)
NaCl
b)
Na+
c)
K+
d)
Cl-
11.
What number(s) on the graph represents the THRESHOLD level of stimulus?
a)
1 and 5
b)
2
c)
3
d)
6
12.
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
13.
At what stages do Sodium/Potassium Channels open?
a)
Repolarization/ Repolarization
b)
Depolarization/ Hyperpolarization
c)
Hyperpolarization/ Repolarization
d)
Depolarization/ Repolarization
14.
Which one of the following is involved in maintaining a resting membrane potential?
a)
Na+/K+ ATPase pump moves 3Na+ in for every 2K+ out
b)
Na+/K+ ATPase pump moves 3K+ in for every 2Na+ out
c)
Na+/K+ ATPase pump moves 3Na+ out for every 2K+ in
d)
Na+/K+ ATPase pump moves 3K+ out for every 2Na+ in
15.
Depolarization is occuring at number
a)
1
b)
2
c)
4
d)
5
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