Question

question 6 of 10
when you touch something hot, a neuron in your finger senses the temperature. which best describes the first reaction the neuron has?
a. ions flow into the neuron.
b. sodium atoms travel through the veins.
c. a resting potential forms.
d. neurotransmitters cross a synapse.

Explanation:

When a neuron senses a stimulus like heat, ion - channels open and ions (such as sodium ions) flow into the neuron, which is the first step in generating an action potential. Sodium atoms do not travel through veins as they are part of the neuron's electrical signaling process at the cellular level. A resting potential is the neuron's state before stimulation. Neurotransmitters cross a synapse as part of communication between neurons after an action potential has been generated and propagated to the axon terminal.

Answer:

A. Ions flow into the neuron.