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 Form 1 Biology topical questions and answers on the cell

State one way in which each of the following is naturally adapted to its function:
(a) Neurone.
(b) Mitochondrion

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Answer Text:
a)- Large cell body that controls cell activities.
- Has many extensions i.e dendrites, axons and dendrons that receive and send impulses from one part of the body to another.
- Has myelin sheath or medullated sheath which is fatty sheath that encloses the axon hence insulate the axon and impulses.
- Has Schwann cells that are in close contact with axon and they secrete the myelin sheath.
- Myelin sheath has constrictions at intervals –called nodes of Ranvier to propagate the nerve impulse and speed up the transmissions of an impulse.
b)- Inner membrane is greatly folded to form cristae which increase surface area for respiratory activity.
- Matrix contains enzymes that catalyzes the rate of reaction.


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