8. Endocrine System Flashcards
Anterior Pituitary hormones:
'FLAT GP' Follicle-Stimulating Hormone Luteinising Hormone Adrenocorticotrophic Thyroid-stimulating hormone Growth hormone Prolactin
Posterior Pituitary hormones:
OA (Overseas Adventure is Posterior to studies)
Oxytocin
Anti-diuretic hormone
FSH:
Develops eggs/follicles in ovaries and testes, enhances sperm production
LH:
Ovulation, testosterone production, secretion of progesterone/oestrogen
Adrenocorticotrophic hormone:
Stimulates adrenal cortex
Thyroid-stimulating hormone:
Stimulates thyroid gland
Growth hormone:
Stimulates bone/muscle growth
Prolactin:
Stimulates milk production
Oxytocin:
Stimulates ‘let-down’ of milk and uterine contractions
Anti-diuretic hormone:
Ups water retention
Adrenal cortex produces:
Glucocortacoids
Mineralocorticoids
Gonadacorticoids
Adrenal medulla produces:
Epinephrine, Norepinephrine
Glucocortacoids:
Controls blood glucose levels and stress
Mineralocorticoids:
Controls mineral and water balance
Gonadacorticoids:
Regulates sex hormones
Thyroid gland produces:
Thyroid Hormone
Calcitonin
Parathyroid produces:
Parathyroid hormone - increases blood calcium
Thyroid hormone:
Stimulates metabolism
Calcitonin:
decreases blood calcium level (Calciton-IN = puts calcium IN the bones)
Pineal gland produces:
Melatonin - influences sleep/wake cycles
Pancreas produces:
Insulin and glucagon
Thymus produces:
Thymosin - supports immune system
Insulin:
Reduces blood sugar
Glucagon:
Increases blood sugar
Testosterone:
Produced in testes
Supports sperm formation & develops secondary sex characteristics
Progesterone:
Produced in ovaries
Maintains pregnancy & lactation prep.
Oestrogen:
Growth/maturation of female sex characteristics
3 Types of stimulation of endocrine glands:
hormonal - by other hormones
humoral - changes in blood concentration
neural - nerve stimulation
Endocrine gland:
ductless (no passageways) cluster of cells that releases hormones directly into surrounding tissue i.e blood, lymph
Hormone:
Chemical messenger made by cells inside gland/organ
Target cell:
Destination for a specific hormone
Receptors on plasma membrane (AAB) or inside cell (SB)
Steroid-based hormones (SB):
Lipid soluble, bind to receptors within a cell
Amino Acid-based hormones (AAB):
Water soluble, bind to receptors on plasma membrane, triggering a “second messenger”
Because steroid-based hormones are _____ , they can pass freely through ________
lipid soluble
cell membranes