Edexcel IGCSE - Biology (Seperate) - Hormones

Adreneline: Source

Adrenal Glands

Where are the adrenal glands

On top of the Kidneys

Adreneline: Role

Redies body for fight or flight response

Adreneline: Effects

Increases heart rate, blood flow to muscles and blood sugar levels

Insulin: Source

Panceas

Insulin: Role

Control blood sugar levels

Insulin: Effects

Stimulates the liver to turn glucose into glycogen for storage

Testosterone: Source

Testes

Testosterone: Role

Main male sex hormone

Testosterone: Effects

Promotes male secondary sexual charachteristics

Progesterone: Source

Ovaries

Progesterone: Role

Supports Pregnancy

Progesterone: Effects

Maintains uterus lining

Oestrogen: Source

Ovaries

Oestrogen: Role

Main female sex hormone

Oestrogen: Effects

Controls the menstural cycle and promotes female secondary sexual charachteristics

ADH: Source

Pituitary Gland

Where is the Pituitary Gland?

Brain

ADH: Role

Controls water content

ADH: Effects

Increases permeability of the collecting duct to water

FSH: Source

Pituitary Gland

FSH: Role

Female sex hormone

FSH: Effects

Causes an egg to mature in the ovary. Stimulates ovaries to produce oestrogen.

LH: Source

Pituitary Gland

LH: Role

Female sex hormone

LH: Effects

Stimulates release of an egg from ovary