You may be asked about some common hormones and their functions. 

HormoneFunctionSite of Secretion
InsulinMaintains blood sugar levelPancreas
GlucagonIncreases blood glucose levelPancreas
ADHRegulates amount of water in bloodPituitary Gland
AdrenalineIncreases heart rate, blood pressureAdrenal glands (kidney)
Testosterone (male)Mainly sperm production Testes
Oestrogen (female)Stimulates the growth of uterus liningOvaries
Progesterone (female)Maintains the uterus liningOvaries
Oxytocin (female)Releases breast milkPosterior pituitary
Prolactin (female)Milk production in mammary glandsAnterior pituitary