In dim light a reflex is triggered to make the pupil dilate. The CIRCULAR muscles RELAX and the RADIAL muscles CONTRACT.

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

The ciliary muscles contract which slacken the suspensory muscles. This causes the lens to become fat (more curved) so increases how much light is ben...

The brain or spinal cord

A muscle that controls the diameter of the pupil and how much light enters. The coloured part of the eye.

1) Menstruation-the uterus lining breaks down2) The uterus lining builds up again3) Ovulation-Around day 14 a egg is released from an ovary.4) The wal...

It can be controlled by eating a carbohydrate controlled diet and getting regular exercise.

Auxin promotes growth in shoots and inhibits growth in roots.

Receptors send messages to the CNS via the sensory neurone.

People are unable to focus on near objects. This occurs when the lens doesn't refract the light enough or the eyeball is too short. The image is broug...

Ammonia is produced as a waste product. Ammonia is toxic so it is converted into urea in the liver.

It makes the liver convert glucose into glycogen. This causes blood glucose levels to decrease.

FSH and LH are given to a woman to help eggs mature and release. Eggs are then collected from a woman's ovaries. The eggs are fertilised in a lab with...