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How do you go about writing a 25 mark essay question?

Always start with planning. Even if there is little time, mind map briefly as many points that you could talk about. Ideally you need to write about at least five.Always start the essay with a brief introduc...
DL
Answered by Dillon L. • Biology tutor
12330 Views

What role does acetylcholine have at the neuromuscular junction.

The neuromuscular junction is the meeting point between a nerve and a muscle, specifically a motor neurone and a muscle fibre. It is the way in which the brain communicates with the muscles of the body to in...
AS
Answered by Aaron S. • Biology tutor
4415 Views

How do vaccinations work? Why don't they cause disease?

A vaccine is a weakened form of the disease causing bacteria injected in to the patient. The person then develops immunity to that bacteria and so when they are infected with the bacteria, they are able to q...
AK
Answered by Acrisa K. • Biology tutor
3226 Views

How is the concentration of blood and urine controlled by the body? (6 marker)

Concentration of urine is controlled by the hormone ADH (anti-diuretic hormone)This hormone is released into the bloodstream; by the posterior pituitary glandIf the water concentration in the blood is too hi...
RA
Answered by Rayyan A. • Biology tutor
4272 Views

Give 2 adaptions of the alveoli that maximise gas exchange

Curved surfaces, providing a large surface areaThin, providing a short diffusion distance
MH
Answered by Michael H. • Biology tutor
3186 Views