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Describe how the structure of alveoli in the lungs enables efficient oxygen supply during aerobic respiration?

The alveoli are sac like structures which have a large surface area to volume ratio allowing for fast diffusion of oxygen into the blood (Fick's law). This large SA:V ratio is generated because the alveoli h...
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Answered by Philip B. • Biology tutor
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What features of the nephron allow ultrafiltration to take place in the kidneys?

The glomerulus is a knot of cappilaries inside the Bowman's capsule. The afferent arteriole (small blood vessel leading into the glomerulus) has a much larger diameter than the efferent arteriole (small bloo...
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Answered by Laura E. • Biology tutor
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Describe how animals and plants are adapted to survive in dry conditions such as deserts.

Animals Have large surface area to increase loss of heat by radiation, which allows the animal to keep cool. Have reduced body fat. Body fat acts as an insulating layer preventing loss of heat from the body....
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Answered by Elakkeya J. • Biology tutor
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Why is diffusion important in plants and animals? Give examples

The process of diffusion is extremely important for the uptake of substances into cells. These substances can be very important for a whole range of cellular processes. Its also useful in reomoving waste pro...
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Answered by Benito W. • Biology tutor
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Why should different animals have different haemoglobin types

Some animals contain haemoglobin molecules which are structured in way which allows them to have a high affinity for oxygen whilst some are the complete reverse. The reason for this is all to do with the env...
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Answered by Benito W. • Biology tutor
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