coordination and control Flashcards
where is insulin released and function
released: pancreas
function: lowers blood glucose levels
where is ADH released and function
released: pituitary gland
function: reduced amount of water loss in urine
where is oestrogen released and function
released: ovaries
function: stimulates uterus lining to develop and development of secondary sexual female characteristics
where is progesterone released and function
released: ovaries
function: maintains uterus lining and controls the development of secondary sexual female characteristics
where is testosterone released and function
released: testes
function: stimulates development of male secondary sexual characteristics
where is adrenaline released and function
released: adrenal gland
function: increases heart and breathing rate for fight, fright or flight
where is FSH released and function
released: pituitary gland
function: stimulates an egg to mature in ovaries
where is LH released and function
released: pituitary gland
function: stimulates the release of an egg from the ovary (ovulation)
3 things that happen when you are too hot
- vasodilation
- sweating
- hairs lay flat
3 things that happen when you are too cold
- vasoconstriction
- shivering
- hairs stand on end
define homeostasis
the maintenance of a constant internal environment
what is osmoregulation
regulation of water levels within the body
what monitors the concentration of water in the blood
hypothalamus
what are tropisms
growth of a plant toward a directional stimulus
what is a positive phototropism
plants growing toward light
what controls the growth of tropisms
auxin
what is a positive geotropism
growth toward gravity
characteristics of endocrine system
- slow release (except adrenaline)
- chemical message
- transported via blood
- targets cells but sent over the whole body
- controls long term processes
characteristics of nervous system
- fast release
- electrical impulses
- sent across neurones
- message sent directly to muscle/gland
- used when a fast response is needed
define a hormone
chemical response to a stimulus
role of the cornea
a curved transparent disc at the front of the eye. does most of the focusing
role of the pupil
a circular opening whose size is controlled by the iris
role of the iris
a ring of muscles with a hole in the middle - controls how much light enters the eye
role of the lens
changes shape to fine tune the focusing of light onto the retina
