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# 1
pilihan
Axon membrane potential when there is no impulse transmitted?
- 70 mV
- -70 mV
- -55 mV
- +35 mV
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Ikut Turutan
Universiti
Sains
61
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# 2
pilihan
Which of the following can trigger formation of action potential in axon membrane?
- Depolarization
- Repolarization
- Threshold level
- Stimulus
# 3
pilihan
Which of the following transport protein in axon membrane will be opened when stimulus is presence?
- Voltage-gated Na+ channel
- Voltage-gated K+ channel
- Sodium-potassium pump
- Non-voltage Na+ channel
# 4
pilihan
Which of the following is the phase of axon membrane potential become more positive due to surge of Na+ inflow?
- Rising phase of action potential
- Falling phase of action potential
- Resting state
- Undershoot
# 5
pilihan
What is depolarization?
- Outflow of Na+ from axon membrane
- Inflow of K+ into axon membrane
- Inflow of Na+ into axon membrane
- Outflow of K+ from axon membrane
# 6
pilihan
What is repolarization?
- Outflow of Na+ from axon membrane
- Outflow of K+ from axon membrane
- Pump in of 2 K+
- Pump out of 3Na+
# 7
pilihan
Which of the following is NOT true about threshold potential?
- -55mV
- A level that is must achieved by depolarization to trigger formation of action potential
- causing the axon become hyperpolarized
- below this potential, action potential will not form
# 8
pilihan
Which of the following allow action potential transmission is in one way?
- All-or-nothing event
- Refractory period
- Myelinated axon
- Large diameter of axon
# 9
pilihan
What is NOT true about saltatory conduction?
- Impulse jump from node to node of Ranvier
- Impulse transmission is slow
- Occurs in myelinated axon
- Only node of Ranvier on axon is depolarized
# 10
pilihan
Which of the following will return the axon membrane from undershoot to resting state?
- Voltage-gated Na+ channel
- Non-voltage Na+ channel
- Non-voltage K+ channel
- Sodium-potassium pump
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