Question

What determines the frequency of action potentials in the axon of the sensory neuron (R2)?

1) the amplitude of the depolarization at the sensory receptor (R1)
2) the amplitude of the action potential at R2
3) the amount of calcium that enters the sensory receptor
4) the amount of neurotransmitter released by the sensory receptor

Answer 1

The amplitude of the depolarization at the sensory receptor (R1) determines the frequency of action potentials in the axon of the sensory neuron (R2).

Step-by-step explanation:

The frequency of action potentials in the axon of the sensory neuron (R2) is determined by the amplitude of the depolarization at the sensory receptor (R1).

When the sensory receptor detects a stimulus, it generates a graded potential that can depolarize the sensory neuron. If the depolarization reaches a certain threshold, it triggers an action potential in the sensory neuron's axon.

Therefore, the amplitude of the depolarization at the sensory receptor (R1) directly affects the frequency of action potentials in the axon of the sensory neuron (R2).