biopsychology 1.3 Flashcards
The function of the endocrine system: glands and hormones.
what is the function of the endocrine system?
works alongside the nervous system to control vital functions in the body through the action of hormones
tt tell glands in our body when to release hormones
which system does the endocrine system work slower than?
the nervous system
what are glands?
organs in our body that produce hormones
the key endocrine gland
pituitary gland
where is the pituitary gland located?
the brain
function of pituitary ‘master’ gland
controls the release of hormones from all other endocrine glands in the body
hypothalamus function
controls release of hormones from pituitary gland
the hypothalamus is a small area in the centre of the brain
it helps produce hormones that regulate heart rate, body temperature, hunger, and the sleep-wake cycle
what is the pituitary gland divided into?
anterior (front) lobe
posterior (rear) lobe
anterior lobe (pituitary gland)
releases adrenocorticotropic hormone (ACTH)
this stimulates the adrenal cortex and the release of cortisol
posterior lobe (pituitary gland)
releases oxytocin, love hormone responsible for uterus contractions during childbirth
ovaries
release oestrogen, controls regulation of female reproductive system including menstrual cycle and pregnancy
adrenal gland
divided into two parts:
adrenal medula
adrenal cortex
adrenal medula
releases adrenaline and noradrenaline which play a key role in fight or flight
adrenal cortex
releases cortisol which stimulates the release of glucose while supressing the immune system
testes
release androgens which induces testosterone
responsible for development of male sex characteristics during puberty and muscle growth
why is the endocrine system slower than the nervous system?
because hormones have to travel through the bloodstream
however the effect is longer lasting and widespread
what does the endocrine system consist of?
glands that secrete hormones, unlike nervous system that uses nerve impulses to transmit information
endocrine system uses blood vessels
how does the body regulate behaviour as a result of biological processes?
glands regulate themselves like a thermostat, once a sufficient amount is in the bloodstream the gland stops secreting hormones
whilst the hormones may come into contact with all organs, they only have an impact on a limited number known as target cells
this is how the body regulates behaviour as a result of biological processes