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The alveoli are covered by a rich blood supply of capillaries- this provides a diffusion gradient for oxygen to move into the blood and carbon dioxide to move into the lungs.The alveoli are also highly fo...

She is dehydrated so osmoreceptors in the hypothalamus shrink, this causes ADH to be secreted by the pituitary gland. The ADH travels in the blood stream and acts on the collecting ducts of the kidney nep...

Mitosis is the process used by normal body cells for everyday replication to maintain a healthy body, for example tissue regeneration. On the other hand, meiosis is the process whereby the gametes, sperm ...

Answers are any 2 of the following:
1) plant cells have a cell wall whereas animal cells do not2) plant cells have vacuoles whereas animal cells do not3) plant cells have chloroplasts whereas animal ...

A reflex occurs when movement is produced without conscious thought. They can therefore be described as autonomic and produce movement faster than voluntary movements (which do require conscious thought)....