What is a hormone and how does it act?
-:- Hormones are chemical messengers that are responsible for regulation. They are
secreted into body fluids, mainly blood. It has specific actions on target tissues,
which are any tissue that has specific receptors for that particular hormone.
What is ...
✓ -:- The anterior pituitary becomes an endocrine gland producing and secreting
hormones for the body and connects to the posterior pituitary when fully formed.
Meanwhile, the posterior pituitary remains connected to the hypothalamus,
functioning as a repository for hormones produced by the hypothalamus and
receiving messages from it that regulate when hormones are to be released to and
through the anterior pituitary
What regulates pituitary gland secretion?
✓ -:- Hypothalamus
Describe tropic hormones
✓ -:- stimulate other endocrine glands to release hormones
anterior pituitary hormones
✓ -:- ACTH - controls manufacture and secretion of certain hormones from the outer
layer of the adrenal gland.
FSH - controls growth and development of follicles that house egg cells in ovaries and
stimulate production of sperm cells in the testes.
GH - stimulates cells to enlarge and more rapidly divide
LH - promotes secretion of sex hormones and allows release of egg cells from ovaries
PRL - promotes milk production
4|Page | Grade A+| 2024/2025
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