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Hormones: Year 12 ATAR Human Biology

Hormones

Released from

Target cells

effect

disruptions

Follicle-stimulating hormone (FSH)







Anterior pituitary gland

Ovaries

testes

Growth of follicles

Production of sperm

Too  little – gonads don't make enough 

too much –gonads too many sex

Luteinising Hormone (LH)

Ovaries 

testes

Ovulation and maintenance of corpus luteum.

Secretion of testosterone

Too little – gonads don't make enough sex hormones

 too much – gonads secrete too many sex hormones

Adrenocorticotropic Hormone (ACTH)

Adrenal Cortex

Secretion of hormones from the adrenal cortex

too little – the adrenal glands don't make enough of their hormones

 too much – the adrenal glands make too much of their hormones

Thyroid Stimulating Hormone (TSH)

Thyroid

Secretion of hormones from the thyroid

  too little – thyroid gland doesn't make enough of its hormones

too much – thyroid gland makes too much of its hormones

Prolactin

Mammary glands

Milk production

too little – decrease in milk production

 too much – increase in milk production

Growth Hormone (GH)

All cells

Growth and protein synthesis

too little – less growth/protein synthesis

Too much -  increase in bone college and other tissue size

Oxytocin

Posterior Pituitary Gland

Uterus

Mammary Gland

Contractions of the uterus during childbirth. Release of milk

too little – not a lot of milk and less contractions during childbirth

 too much – overactive uterus, and releases too much milk

Antidiuretic Hormone (ADH)

Kidneys

Reabsorption of water

Too little – unabsorbed water

 too much – body routines too much water

Cortisol




Adrenal Cortex

Most body cells

Promotes normal metabolism; helps the body deal with stress; promotes tissue repair

Too little – irregular metabolism, more stress, damaged tissues

 too much – causes Cushing's syndrome

Aldoesterone (mineralcorticoid)

kidneys

Increases reabsorption of sodium ions and excretion of potassium ions

too little – low sodium levels less excretion of potassium ions

 too much – high blood pressure, too much sodium and two little potassium ions

Gonadocorticoids

Many tissues

Production of small amounts of sex hormones

too little – less sex hormones

 too much – too many sex hormones

Glucocorticoids

Most body cells

Growth and protein synthesis

Adrenaline


Adrenal Medulla

Most body tissues

Prepares the body for fight/flight response. Mimics & magnifies the effect of the sympathetic nervous system. 

too little – body doesn't react properly or quick enough in a stressful situation.

too much – high blood pressure/anxiety, hyper aware

Non-adrenaline

Most body tissues

Prepares the body for fight/flight response. Mimics & magnifies the effect of the sympathetic nervous system. 

too little – decrease rate and force of heartbeat

 too much – high increase of heart rate, and forceful heartbeat


Glucagon

Pancreas: the islet of Langerhans alpha cells

Liver and fat storage tissues

Stimulates the breakdown of glycogen and fat

Increase blood glucose levels.

Too little – decreased blood glucose levels, less breakdown of glycogen/fats.

too much – increase in blood glucose levels


Insulin

Pancreas: the islet of Langerhans beta cells

Most body cells

Stimulates uptake of glucose; lowers blood glucose levels

Too much – low blood glucose level levels

 too little – high blood glucose levels

Parathyroid Hormone

Parathyroid Gland

Bones

Kidneys

Increases calcium levels in the blood

too little – blood calcium levels fall

 too much – too much calcium in the blood, weaker bones

Melatonin

Pineal Gland

All body cells

Sleep (biological clock)

too little – stay awake more

 too much – asleep more/more tired

Thyroxine


Thyroid Gland

Most body cells

Increases metabolic rate of cells

too little – decrease in metabolic rate and oxygen consumption,  decreased body heat 

 too much – very high metabolic rate, too much oxygen and increased body heat

Calcitonin

Bones, kidneys

Decreases calcium and phosphate levels in the blood

too little – too much calcium in the blood

 too much – decrease calcium phosphate levels in blood 

Thymosin

Thymus

T-Lymphocytes

Stimulates development and maturation of T-lymphocytes

too little – increase susceptibility of infection

 too much – strong immunity to infection

Testosterone

Testes

Many tissues

Stimulates sperm production and development of secondary sexual characteristics.

too little – less spam production, decrease skeleton/muscle growth/sexual development

 too much – low sperm count, shrinking of testes

Progesterone


Ovaries

Uterus

Mammary glands

Regulates menstrual cycle and pregnancy. Preps mammary glands for milk secretion

too little – irregular menstrual periods, glands not prepared for milk

 too much on a regular menstrual cycle, weight gain, mood changes

Oestrogen

Many tissues

Regulate menstrual cycle

Stimulate the development of secondary sexual characteristics.

too little – may delay puberty and slow and/or prevent sexual development

 too much – irregular period, weight gain