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Endocrine

Endocrine
Is composed of glands and functions as a communication system.
Regulating metabolism
Regulating reproduction
Maintaining homeostasis
Regulating growth and development
Endocrine glands
Pituitary gland: Produces human growth hormone
Thyroid gland: Produces thyroxine and calcitonin
Ovary(female): Produces estrogen
Pancreas: Produces insulin and glucagon
Adrenal gland: Produces cortisol and aldosterone
Testis(male): Produces testosterone
Hormones
Steroid
Nonsteroid ( Amino acid)
Are composed of lipids that can easily pass through the plasma membrane because they are soluble in lipids, and they bind to receptors inside the cell.
Are composed of lipids that can easily pass through the plasma membrane because they are soluble in lipids, and they bind to receptors inside the cell.
Negative feedback
 The endocrine system plays an important role in sustaining and regulating homeostasis using negative feedback mechanisms.
(hGH) Regulates the body's physical growth by stimulating cell division in muscle and bone tissue.
Anterior
Posterior
Oxytocin: causes contractions of the smooth muscle in the wall of the uterus.
(ADH) antidiuretic hormone: regulates water balance and affects portions of the kidneys called the collecting tubules, this conserves the water for the body.
Thyroxin
Calcitonin
Causes cells of the body to have a higher rate of metabolism.
Lowers blood calcium levels by signaling bones to increase calcium absorption and signaling the kidneys to excrete more calcium.
Parathyroid gland
Parathyroid hormone
Increases blood calcium levels by stimulating the bones to release calcium, kidneys to to reabsorb more calcium, and the intestines to absorb more calcium from food.
Insulin
Glucagon
Lowers blood glucose levels by promoting the uptake of glucose by most cells of the body to make a glycogen.
Raises blood glucose levels by stimulating liver cells to convert glycogen to glucose and release the glucose into the blood.
Aldosterone
Cortisol
Affects the kidneys and is important for reabsorbing sodium.
It increases blood glucose levels and reduces inflammation.
Mays Mohanmmed Alalwan
9A
34
author ميس العلوان
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