Edexcel Igcse Biology Chapter 7: Chemical Coordination

Front 1

differences between nervous and endocrine system (4(

Back 1

nervous system: nerve impulses, fast/instant, short lived response, localised effect
endocrine system: hormones, slower (take longer to act), longer lasting, widespread effect

Front 2

source, role and effect of adrenaline

Back 2

adrenal glands, prepare body for physical activity (fight or flight,) increased heart rate, increased breathing rate, faster reactions, blood diverted from intestine to muscles

Front 3

source, role and effect of anti-diuretic hormone (ADH)

Back 3

pituitary gland, controls water level of blood, causes kidney to reabsorb more water into the blood

Front 4

source, role and effect of insulin and glucagon

Back 4

pancreas, insulin lowers blood glucose levels by converting glucose into glycogen (long term store), glucagon does the opposite and converts glycogen into glucose to raise blood glucose levels

Front 5

source, role and effect of tetosterone

Back 5

testes, controls development of male secondary sexual characteristics

Front 6

source, role and effect of oestrogen and progestrone

Back 6

ovaries, oestrogen controls female secondary sexual characteristics
progesterone regulates the menstrual cycle