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what is the endocrine system?
wat do endocrine glands do?
- the chemical (steroid) communication network
- glands produce hormones which are secreted into the bloodstream, through which they travel around the body affecting other glands & organs
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what kind of responses are these glands used for?
ones requiring more gradual bodily changes
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the endocrine & _______ systems have a ___ relationship
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main 7 (8) endocrine glands (from top to bottom):
- pineal gland
- hypothalamus
- pituitary (master) gland
- thyroid gland
- adrenal glands (2)
- pancreas
- ovaries/ testes
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(give the location, hormone it secretes, & the effect)
pineal gland:
- brain
- melatonin
- regulates sleep cycle (light sensitive)
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hypothalamus
- brain
- none
- provides link between nervous & endocrine systems
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pituitary (master) gland
- brain
- growth hormone (GH)
- regulates physical growth
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thyroid gland
- neck
- thyroxin
- regulates metabolism (extremely sensitive to radiation)
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adrenal glands (adrenals)
- abdominal cavity
- adrenaline (epinephrine)
- stimulates sympathetic nervous system arousal
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pancreas
- abdominal cavity
- insulin
- regulates blood sugar
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high insulin _____ blood sugar
lowers
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ovaries/ testes
- groin
- estrogen/ testosterone
- sexual arousal, reproduction, secondary sex characteristics/ changes in puberty, building muscle mass
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