I- For a neuron to fire an action potential in respond to a depolarizing stimulu

Question

I- For a neuron to fire an action potential in respond to a depolarizing stimulus, its membrane potential must reach a critical value called a. Zero potential. b. Threshold potential c. Resting membrane potential. d. Reversal potential. e. Action potential. 2- Which of the following is NOT true about electrochemical equilibrium? The force of the membrane potential is balanced by the tendency of ions to diffuse down a. their concentration gradients. b. The membrane potential is referred to as resting membrane potential. c. The membrane potential is referred to as reversal potential. d. The membrane potential is referred to as equilibrium potential. e. All of the are true statements about electrochemical equilibrium. Which of the following is (are) required for the propagation of the action potential (AP) along the neuron's axon? 3- a. The sodium/potassium ATPase pump. b. Voltage-gated Na channels c. Voltage-gated K+ channels. d. Voltage-gated Ca2 Channels. e. b and c. Which of the following is (are) required for the secretion of the neurotransmitter upon arrival of the AP at the axon terminals? a. The sodium/potassium ATPase pump. b. Voltage-gated Na channels. c. Voltage-gated K+ channels. d. Voltage-gated Ca2 Channels. e. b and c

Explanation / Answer

1)B) threshold potential

2)e) all are true

3)e)

4)d)

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