The principle endocrine glands of mammal, hormones and functions of the hormones
The principle endocrine glands of mammal, hormones and functions of the hormones
| Gland | Hormone | main function | |
| a. | Thyroid | Thyroxine | Raise basal metabolic rate |
| Calcitonin | Opposes action of parathormone | ||
| b. | Parathyroid | Parathormone | Controls concentration of calcium and phosphate ions in blood |
| c. | Pancreas | insulin | lows blood sugar concentration |
| d. | Adrenal medulla | adrenaline | prepare body for emergency; metabolic rate increases, |
| e. | Adrenal cortex | Aldosterone | Controls concentration of K+ and Na+ in blood |
| Cortisol | Prevent excessive immune response | ||
| androgens | Promotes development of testes and secondary sexual characteristics | ||
| F | Pineal body | melatonin | causes concentration of melanin in frog’s skin; promote sexual development in mammal |
| g. | Testes | Androgens | Promotes development of testes and secondary sexual characteristics |
| h. | Ovaries | Estrogens | promotes development of ovaries secondary sexual characteristic of female control menstrual cycle and pregnancy. |
| I | Pituitary
(anterior lobe) |
Thyroid stimulating hormone | Causes the thyroid gland to secrete thyroxine |
| Adreno -corticotrophin
(ACTH) |
Cause adrenal cortex to secrete adrenal cortical hormones | ||
| Growth hormones | Stimulate growth | ||
| prolactin | Causes mammary gland to secrete milk | ||
| Follicle stimulating hormone | Controls testes and ovary | ||
| Luteinizing hormone | Controls testes and ovaries | ||
| Pituitary
(posterior lobe) |
Antidiuretic hormone (ADH) | Causes reabsorption of water in kidney | |
| oxytocin | Causes contraction of uterus at birth |
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CATEGORIES o level biology revision questions
TAGS Dr. Bbosa Science
