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bezimeni [28]
3 years ago
9

Help now! Please! I’ll mark you Brainly

Biology
1 answer:
stellarik [79]3 years ago
7 0

Answer:

Cellular respiration takes place in the cells of all organisms!

Explanation:

It occurs in autotrophs such as plants as well as heterotrophs such as animals. Cellular respiration begins in the cytoplasm of cells. It is completed in mitochondria.

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Once a neuron is stimulated and the membrane potential is depolarized, the depolarized axonal membrane is helped to return to it
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Answer:

Explanation:

The cell membrane separates the cell from the outer environment. The extracellular fluid contains the sodium ions (Na+), chloride ions (Cl-), while intracellular fluid contains potassium (K +) and negative anions.

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But the initial stability of the cell membrane has to be maintained. To restore the resting stage, the sodium ions start to move out of the membrane and potassium ions enter into the cells again. This is an active transport and has done by the Na+ - K+ pump. Here 3 sodium ions move out and 2  potassium ions pumped into the cell through the plasma membrane.  

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