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Biology
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Describe how phagocytosis of a virus leads to the secretion of an antibody against this virus antigen.

Phagosome/vesicle fuses with lysosome;(Virus) destroyed by lysozymes/hydrolytic enzymes;Peptides/antigen (from virus) are displayed on the cell membraneHelper T cell/TH cell binds to the antigen (on the a...

Answered by Victoria G. Biology tutor
2909 Views

Suggest and explain two ways the cell-surface membranes of the cells lining the intestine may be adapted to allow rapid transport of nutrient

Membrane has increased/large surface area for (fast) diffusion/facilitated diffusion/active transport/co-transport;Large number of protein channels/carriers (in membrane) for facilitated diffusion;Large n...

Answered by Victoria G. Biology tutor
3199 Views

How does the body control blood sugar

In order to maintain homeostasis, which in this case means a stable blood glucose, certain hormones must be released in situations which alter blood glucose. This occurs most commonly after a meal (increa...

Answered by Georgie W. Biology tutor
2122 Views

If someone has blood type A+: which are his possible genotypes and who can he donate blood to?

The ABO blood type system relies upon the co-dominant alleles IA and IB, which are expressed any time they are present and are dominant over i which is recessive. If someone has bloo...

Answered by Francisco T. Biology tutor
38588 Views

Describe how the small intestine is adapted for efficient glucose absorption. (3 marks)

The small intestine has a very large surface area to increase the amount of area that glucose can diffuse out of the small intestine into the bloodstream. The large surface area is created by villi, which...

Answered by Morgan H. Biology tutor
18744 Views

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