Juan, a graduate student in an electrophysiology lab, stimulates an isolated neuron grown in a petri dish and measures its action potential. how will the neuron respond to the firing of the action potential?

a. its dendrites will extend.

b. its dendrites will retract.

c. it will take up chemical messengers.

d. it will release chemical messengers.

Answer: d. it will release chemical messengers.

The action potential, which is an electric pulse, will travel down the axon untill it reaches the synapses. At the synapses, neurotransmitters (chemical messengers) will be released by the neuron.

answer by yourhope:

answer is

human impact on the environment can be seen in the deterioration of the !

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when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.