Nervous system includes which of these major components?
Correct answer: C. brain, spinal cord and neurons
- A. Brain
- B. Brain & Back Bone
- C. brain, spinal cord and neurons
- D. None
Explanation
The nervous system includes the brain and spinal cord, while neurons are the specialised cells that transmit its signals. Option c is the closest complete description among the choices, whereas the backbone is a bone, not the spinal cord.
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The human body is studied through its organ systems, including digestion, respiration, circulation, excretion, nervous coordination, reproduction and immunity. Coverage also includes nutrients and deficiency diseases, hormones, blood groups, common infections, vaccines, sanitation and basic first aid, while distinguishing communicable diseases from inherited and lifestyle disorders.
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