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Hormone Functions
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Oxytocin
Triggers childbirth contractions and release of milk during breastfeeding. It is also linked to social bonding and trust.
Parathyroid Hormone (PTH)
Regulates calcium levels in the blood, with effects on bone formation, kidney function, and absorption of calcium from the digestive tract.
Thyroid-Stimulating Hormone (TSH)
Stimulates the thyroid gland to produce thyroxine (T4) and then triiodothyronine (T3), which stimulate the metabolism of almost every tissue in the body.
Growth Hormone (GH)
Stimulates growth, cell reproduction, and cell regeneration.
Calcitonin
Lowers blood calcium levels by inhibiting osteoclast activity and increasing the excretion of calcium by the kidneys.
Thyroxine (T4)
Regulates metabolism, heart rate, digestion, and bone health.
Norepinephrine (Noradrenaline)
Functions primarily as a neurotransmitter, it also increases heart rate and blood pressure, aiding the fight-or-flight response.
Cholecystokinin (CCK)
Stimulates the digestion of fat and protein, and signals the gallbladder to release bile to aid fat digestion.
Estrogen
Regulates the female reproductive system, menstrual cycle, and secondary sexual characteristics.
Somatostatin
Inhibits the release of growth hormone and thyroid-stimulating hormone, as well as the secretion of other hormones within the digestive system.
Testosterone
Promotes the development of male secondary sexual characteristics, such as body hair and muscle mass, and supports sperm production.
Adrenaline (Epinephrine)
Triggers the body's fight-or-flight response, increasing heart rate, blood pressure, and energy supplies.
Progesterone
Prepares the endometrium for pregnancy and supports early stages of pregnancy.
Triiodothyronine (T3)
Regulates metabolism, heart rate, digestion, and brain development. More potent than Thyroxine (T4).
Erythropoietin (EPO)
Stimulates the production of red blood cells by the bone marrow.
Aldosterone
Aids in blood pressure regulation by increasing sodium reabsorption by the kidneys, which in turn causes water retention.
Insulin
Lowers blood glucose levels by facilitating cellular glucose uptake.
Glucagon
Raises blood glucose levels by promoting glycogen breakdown to glucose in the liver.
Follicle-Stimulating Hormone (FSH)
Promotes sperm production in males and stimulates the growth of ovarian follicles in females.
Melatonin
Regulates sleep-wake cycles and circadian rhythms.
Ghrelin
Increases appetite and plays a role in regulating the distribution and rate of use of energy.
Prolactin
Stimulates milk production in breastfeeding mothers.
Antidiuretic Hormone (ADH)
Promotes water retention by the kidneys, thus regulating hydration and blood pressure.
Leptin
Regulates energy balance by inhibiting hunger, which in turn diminishes fat storage in adipocytes.
Cortisol
Increases blood sugar through gluconeogenesis, suppresses the immune system, and aids in metabolism of fat, protein, and carbohydrate.
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