Abstinence (not having sex), sterilisation which is having Fallopian tubes or sperm duct cut.

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

People are unable to focus on FAR objects. This occurs when the lens is the wrong SHAPE and refracts the light too much. The image is brought into foc...

Detect the stimulus or change in environment.

Glucagon

Most weeds growing in a field of crops or on a lawn are broad leaved, in contrast to grasses and cereals which are narrow leaves. Selective weedkiller...

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

controls homeostasis and pituitary gland

Produce adrenaline which is used to prepare the body for fight or flight.

The hole in the centre where light enters

Contains receptor cells called rods and cones. These are sensitive to colour and light intensity.

Implant is inserted under the skin. Releases progesterone. Can last for 3 years. Injection lasts less time 2-3 months.

IVF leads to unused embryos which are destroyed or used for medical research. (Potential life).Genetic testing could be carried out on the embryo whic...