Muscles or glands that bring about a response.

The ciliary muscles relax which causes the suspensory muscles to pull tight. This causes the lens to become thinner so refracts light by a smaller amo...

Receptors send messages to the CNS via the sensory neurone.

Where the eye focuses light on the retina by changing the shape of the lens.

Carries impulses from the receptors on the retina to the brain

A neurone that carry information from the receptors to the CNS.

Auxin promotes growth in shoots and inhibits growth in roots.

In a dialysis machine the patients blood flows between a partially permeable membrane surrounded by dialysis fluid. The dialysis fluid contains the sa...

PRO: Gives an infertile couple a child.CON: Multiple births, these are risky, more chance of still birth and miscarriage.CON: Success rate is lowCON:...

At the back, responsible for muscle contraction & balance

Produces glucagon and insulin which are involved in regulating glucose levels in the blood.

Kidneys make urine by taking unwanted waste products out of your blood. They are involved in selective reabsorption.