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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
4499 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
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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
4363 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
3267 Views

Why would someone's hand jerk back when they touch something hot?

This phenomenon is called the 'jerk reflex' and is controlled by an electrical pathway along the nerves in your body. Once the hot object makes contact or comes close to the skin receptors will pick up the s...
KC
Answered by Kayden C. • Biology tutor
8753 Views