Neuronal axons typically have abundant A) voltage-gated channels for Na⁺ that open in response to depolarization. B) voltage-gated channels for K⁺ that open in response to hyperpolarization. C) ligand-gated channels for Na⁺. D) ligand-gated channels for K⁺. E) voltage-gated channels for Ca²⁺.

Question

Quizplus · Accepted Answer

Neuronal axons typically have voltage-gated channels for Na+ and K+ that open in response to depolarization. This allows for the propagation of action potentials down the axon. Choice B is incorrect because channels for K+ do not open in response to hyperpolarization. Choices C and D are incorrect because ligand-gated channels are found on dendrites and cell bodies, not axons. Choice E is incorrect because axons typically do not have voltage-gated channels for Ca2+.

Neuronal Axons Typically Have Abundant