ENDOCRINE Flashcards
(848 cards)
What are the messengers in the endocrine system?
Hormones
How can hormones exert their effect at receptors?
The rate of enzymatic reactions
The transport of ions and molecules across cell
membranes
Gene expression and the synthesis of proteins
Electrical signalling pathways
What does the thyroid gland secrete?
Thyroxine
Calcitonin
What does thyroxine do?
Regulates metabolism
What does calcitonin do?
Inhibits release of calcium from the bones
What do parathyroid glands secrete?
Parathyroid hormone
What does parathyroid hormone do?
Stimulates the release of calcium from bones
What do islet cells in the pancreas secrete?
Insulin
Glucagon
What do the testes secrete?
Testosterone
What do the ovaries secrete?
Oestrogen
Progesterone
What does the adrenal medulla secrete?
Adrenaline
What does the adrenal cortex secrete?
Corticosteroids
Aldosterone
Testosterone
What does the pineal gland secrete?
Melatonin
Types of hormones?
Peptides
Steroids
Amino acid derivatives
Examples of peptide hormones?
Insulin
Glucagon
Prolactin
ACTH
Examples of steroid hormones?
Cortisol
Aldosterone
Oestrogen
Progesterone
Testosterone
Examples of amino acid derivative hormones?
Adrenaline
Thyroxine
How are peptide hormones synthesized?
As prohormones requiring further processing to activate
How are steroid hormones synthesized?
From cholesterol
How are amino acid derivative hormones synthesized?
From tyrosine
How are peptide hormones stored?
In vesicles, secretion regulated
How are steroid hormones stored?
They are not, they are released immediately
How are amino acid derivative hormones stored?
Stored in various ways