Q67. Suppose a neuron was at rest around -65 mV when it was exposed to a neurotr

Question

Q67. Suppose a neuron was at rest around -65 mV when it was exposed to a neurotransmitter that caused the neuron to hyperpolarize. Which of the following could be the effect of the neurotransmitter? (Assume the equilibrium potential for K+ is -85 mV and for Na+ is 50 mV.)

A. It increased K+ conductance.

B. It opened Na+ channels.

C. It produced an inward flow of positive ions and increased membrane potential, Vm.

D. It increased the amount of positive charge in the neuron (i.e., charge became more positive).

Explanation / Answer

A. It increased K+ conductance.

Hyperpolarization causes efflux of positive charge (potassium ions) or influx of negative charge (chloride ions)

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.