SSC MTS EXAM

SSC

BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The nerve impulse is an electrical current that travels along dendrites or axons.
A
True
B
False
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -Impulse enters a neuron through the dendrites. The information acquired at the end of the dendritic tip of a nerve cell sets off a chemical reaction that sends the impulse to the cell body where it is processed. From the cell body, the impulse moves into the axon and then to the axonal ends.

Detailed explanation-2: -An action potential, also called a nerve impulse, is an electrical charge that travels along the membrane of a neuron. It can be generated when a neuron’s membrane potential is changed by chemical signals from a nearby cell.

Detailed explanation-3: -Dendrites are the branched thread-like extensions of a neuron that carry impulses from nearby neurons to the cell body (cyton). Axons carry impulses away from the cyton.

Detailed explanation-4: -Within a neuron, the impulse moves to the tip of an axon and causes the release of neurotransmitters, chemicals that act as messengers. Neurotransmitters pass through the synapse, the gap between two nerve cells, and attach to receptors on the receiving cell.

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