1 Sensory neurons respond to an appropriate sensory stimulus with a change in membrane potential that is all or nothing.

Question

• graded with the stimulus intensity. always small and subthreshold. always large and suprathreshold.

Answer 1

Sensory neurons respond to an appropriate sensory stimulus with a graded change in membrane potential. This means that the change in potential is proportional to the strength of the stimulus, rather than being an all-or-nothing response.

So the correct statement should be:

• Graded with the stimulus intensity.

This implies that stronger stimuli will produce larger receptor potentials in sensory neurons, which can lead to action potentials if the graded potential reaches the threshold.