Which system links brain to every part of body?
Correct answer: A. Nervous system
- A. Nervous system
- B. Brain
- C. Spinal cord
- D. All of above
Explanation
The nervous system connects the brain with the rest of the body through sensory and motor neurons, allowing information to travel in both directions. The brain and spinal cord are important parts of this system, but neither one alone links the brain to every body part. Students may choose the spinal cord because it carries many nerve pathways, but peripheral nerves are also required.
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About Neurons and Nerve Impulse
Neurons receive and transmit information through dendrites, the cell body and axons. The topic explains resting potential, depolarization, repolarization, refractory periods and saltatory conduction, followed by synaptic transmission through neurotransmitters. An action potential is distinct from the graded potential produced at a receptor.
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