hormones and homeostasis

Question 1

endocrine system

Answer 1

slow (expect adrenaline)
chemical
via blood (dissolved in plasma)
target cells respond even though message is sent all over body
controls long term processes such as reproduction and growth

Question 2

nervous system

Answer 2

fast
electrical impulse
along neurones 
message sent directly to muscle/gland
used when fast response is needed

Question 3

insulin

Answer 3

pancreas

causes liver and muscles to take up glucose and convert to glycogen

Question 4

ADH (anti-diuretic hormone)

Answer 4

pituitary gland

controls amount of water lost in urine

Question 5

oestrogen

Answer 5

ovaries

stimulates uterus lining to develop and the growth of secondary female characteristics

Question 6

progesterone

Answer 6

ovaries

maintains uterus lining

Question 7

testosterone

Answer 7

testes

stimulates development of male secondary sexual characteristics

Question 8

adrenaline

Answer 8

adrenal gland

increases heart and breathing rate for fight, fright or flight

Question 9

homeostasis

Answer 9

maintenance of constant internal environment

Question 10

hypothalamus

Answer 10

region of the brain that monitors temp of blood

Question 11

ways body controls temp

Answer 11

sweating- water evaporates and removes heat energy

shivering- more heat released due to increased respiration by muscles

controlling heat loss by controlling amount of blood which flows near the surface of skin

too hot- blood vessels vasodilation allowing greater blood flow to skin surface
hairs flat
too cold- blood vessels vasoconstrict reducing blood flow to skin surface
hairs on end