Arjun's doctor explains to him how a message passes from one neuron to the next, since problems in this process are often related to psychological disorders. Arrange the following events in the correct order:
(A) The nerve ending is stimulated
(B) A chemical called a neurotransmitter is released
(C) An electrical impulse reaches the neuron's ending
(D) The message moves across the synapse to the next neuron
Choose the correct answer from the options given below:
(A) The nerve ending is stimulated
(B) A chemical called a neurotransmitter is released
(C) An electrical impulse reaches the neuron's ending
(D) The message moves across the synapse to the next neuron
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → C, A, B, D
(C) An electrical impulse reaches the neuron's ending — First. Starts the process. An electrical impulse first reaches the ending of the neuron.
(A) The nerve ending is stimulated — Second. The arriving impulse stimulates the nerve ending.
(B) A chemical called a neurotransmitter is released — Third. Once stimulated, the nerve ending releases a chemical, the neurotransmitter. The release follows the stimulation; it does not cause it.
(D) The message moves across the synapse to the next neuron — Fourth. Comes last. The message must move across the synapse, the tiny space that separates one neuron from the next.
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