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What’s the difference between arteries, veins and capillaries?

Blood vessels allow blood to be circulated around the whole body for delivery of oxygen/nutrients and removal of waste products. Structure relates to function.• Arteries - take blood away from the heart. Art...
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Answered by Inshiya K. • Biology tutor
14225 Views

Describe which neurones are involved in coordinating a reflex action.

Reflexes are involuntary and instantaneous actions that occur in response to a stimulus, for example our pupils contracting in response to a bright light. The receptor detects this stimulus and sends an elec...
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Answered by James D. • Biology tutor
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Explain why the blood clots and describe the process of events that causes the blood to clot.

If blood vessels are damaged, such as by a cut in the skin, blood clots to perform two functions. 1) to reduce or stop blood loss2) to prevent the entry of pathogens This triggers a cascade of events, result...
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Answered by Isabella C. • Biology tutor
6268 Views

What's the difference between diffusion and osmosis?

Osmosis is the net movement of water from an area of high water potential to low water potential through a semi-permeable membrane, while diffusion is the net movement of any liquid or gas from an area of hi...
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Answered by Rosalind R. • Biology tutor
10837 Views

Describe the course of blood through the heart and lungs, explaining how it becomes oxygenated.

Considering the heart has 4 distinct chambers - for this question it's best to start in the right atrium. (Supported by a diagram) Deoxygenated blood is returned to the right atrium from the rest of the body...
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Answered by Liam R. • Biology tutor
2750 Views