The activity of a single neuron was recorded after its membrane was bathed with a neurotransmitter.If the neuron's firing rate increased after the bath,what would you conclude?
A) The neurotransmitter blocked the receptor sites.
B) The neurotransmitter was excitatory.
C) The neurotransmitter caused polarization.
D) The neurotransmitter was inhibitory.

Question

Quizplus · Accepted Answer

An increase in firing rate indicates that the neurotransmitter was excitatory, meaning it stimulated the neuron to produce more action potentials. If the neurotransmitter was inhibitory, it would cause a decrease in firing rate. Blockade of receptor sites would prevent the neurotransmitter from having any effect on the neuron, while polarization refers to a change in the membrane potential and does not necessarily indicate whether the neurotransmitter was excitatory or inhibitory.

The Activity of a Single Neuron Was Recorded After Its