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Sagot :
It is true that the action potential is a chemical substance that alters the activity of a receiving neuron.
What is neuron?
- It is the structural and functional unit of nervous system.
- It consists of: dendrites, cell body and axon.
- Dendrites are branched hair-like projections that receives signals.
- Cell body contains mitochondria and other organelles.
- Axons are long tail-like structure that transmits impulse to another neuron. It is covered by insulated myelin sheath. At the terminal it has knob like structure which contains neurotransmitter (chemical messenger) that helps to transfer signal from one neuron to another.
What do you mean by action potential?
- "An action potential is a rapid rise and subsequent fall in voltage or membrane potential across a cellular membrane with a characteristic pattern."
- During resting phase, the extracellular space of neuron is positively charged and intracellular is negatively charged. When neuron receives signal an electrical impulse is generated in which the positive ions start moving inside one by one in forward direction (depolarized) while the previous ones goes back to its resting state (repolarized). As the signal reaches synaptic knob it secretes neurotransmitter in the synaptic cleft, the dendrites of other neurons has receptor in their membrane which is responsible for generating action potential and the signal is passed.
Hence, the statement that the action potential is a chemical substance that alters the activity of a receiving neuron is true.
To know more about action potential here
https://brainly.com/question/14140947
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