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How is the liver adapted to regulating blood component concentrations?

Sinusoids are chambers within the liver where deoxygenated blood from the gut (containing products of digestion) and oxygenated blood from the heart, mix. Sinusoids are lined with liver cells ( hepatocytes )...
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Answered by Sana Z. • Biology tutor
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Describe, using the fluid mosaic model, the structure of the cell membrane in animal cells.

The cell membrane is composed of phospholipid molecules. These have a hydrophobic head and a hydrophilic tail. The molecules arrange themselves in a bilayer so that the hydrophobic heads point outwards and t...
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Answered by Morgan G. • Biology tutor
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Describe competitive and non-competitive enzyme inhibition

Competitive enzyme inhibition- the inhibitor compound is a similar structure to the enzyme’s active site. This means it can fit into the active site of the enzyme, via the glove induced fit, method creating ...
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Answered by Tom H. • Biology tutor
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In humans, males are XY and females are XX. Why are sex-linked characteristics more common in males than females?

The recessive allele is always expressed in males, whereas females need two recessive alleles (homozygous recessive). Females could have dominant and recessive alleles, which would mean they are carriers, bu...
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Answered by Caitlin C. • Biology tutor
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Explain how the mammalian pancreas controls blood sugar concentration after a meal.

The pancreas consists mainly of exocrine tissue (<98%) which produces pancreatic enzymes required for digestion. The remaining endocrine tissue is organised into Islets of Langerhans which contain 5 diffe...
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Answered by Cara H. • Biology tutor
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