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Biology
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Explain how are the lungs adapted for fast gas exchange?

The lungs are specifically adapted for gas exchange (diffusion) - meaning the lungs allow oxygen into the blood stream and carbon dioxide out. To ensure our cells can respire properly, we want fast and ef...

KB
Answered by Katie B. Biology tutor
14348 Views

What is the difference between meiosis and mitosis?

Meiosis is the process whereby gametes (sex cells), the ova in females and the sperm in males are produced. This occurs when the chromosomes (which there are two sets of in a body cell) are replicated, pr...

MG
Answered by Mary G. Biology tutor
2767 Views

Describe and explain the effect of an increase in muscular activity on the heart rate.

An increase in muscular activity increases the rate of aerobic respiration. As a result, more carbon dioxide is formed in the Krebs cycle and the pH is lowered. This reduction in pH is detected by chemore...

SW
Answered by Shauna W. Biology tutor
3534 Views

Describe what happens in a healthy person when the pancreas detects a rise in blood sugar level.

The pancreas responds by releasing insulin. This causes glucose to move into the cells.

AB
Answered by Alfie B. Biology tutor
3118 Views

Explain how shivering helps to raise a persons body temperature.

Shivering involves rapid contracting and relaxing of the muscles. This requires energy and so the muscle cells respire in order to release this energy in the form of heat.

AB
Answered by Alfie B. Biology tutor
3868 Views

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