Answer:
List the features of gas exchange surfaces in animals.
1)They are moist to prevent the cells from drying and to allow gases to dissolve;
2)They have a large surface area , so that a lot of gas can diffuse across at the same time;
3)They have a high concentration gradient - maintained by the movement of air & blood.
During exercise there is an increase in physical activity and muscle cells respire more than they do when the body is at rest. The heart rate increases during exercise. The rate and depth of breathing increases - this makes sure that more oxygen is absorbed into the blood, and more carbon dioxide is removed from it.
The longest period of time is 11 minutes and 35 seconds.
Mitochondria<span> use </span>proteins<span> to break down sugars and produce cellular energy in the form of ATP. ... No matter where </span>mitochondrial proteins are<span> made, they </span>are synthesized<span> on ribosomes that translate messenger RNA into the amino acids that form the </span>protein<span> chain.
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