# 1pilihan
Axon membrane potential when there is no impulse transmitted?
70 mV
-70 mV
-55 mV
+35 mV
Generation of action potential
MASPAITILLA MA
Ikut Turutan
Universiti
Sains
Generation of action potential
1
88
1
Universiti
Sains
Generation of action potential
1
88
1
10 soalan
Allow incorrect answer
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# 2pilihan
Which of the following can trigger formation of action potential in axon membrane?
Depolarization
Repolarization
Threshold level
Stimulus
# 3pilihan
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
# 4pilihan
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
# 5pilihan
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
# 6pilihan
What is repolarization?
Outflow of Na+ from axon membrane
Outflow of K+ from axon membrane
Pump in of 2 K+
Pump out of 3Na+
# 7pilihan
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
# 8pilihan
Which of the following allow action potential transmission is in one way?
All-or-nothing event
Refractory period
Myelinated axon
Large diameter of axon
# 9pilihan
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
# 10pilihan
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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