Auxin diffuses to the dark/shaded side of plant. This causes the cells to grow faster on that side (elongate) which causes the shoot to bend twards th...

A gap between two neurones.

Age, drugs e.g. caffeine or gender

When the pancreas produces little or no insulin.

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...

Produced by the ovaries. Causes the lining of the uterus to grow. Stimulates the release of LH (which causes ovulation) and inhibits the release of FS...

Receptors send messages to the CNS via the sensory neurone.

To only allow small soluble molecules (e.g. urea, water and ions) to move into the dialysis fluid, not large molecules like proteins.

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

Male and female condom, diaphragm, spermicide

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...

The brain or spinal cord