Saturday, April 16, 2011

Objective 14 - Endocrine glands: function and histology

     Describe the location, histology, hormones and functions of the thyroid gland, the parathyroid glands,the adrenal glands,the pancreas, the ovaries, the testes,the pineal gland and the thymus. 
This picture gave me a great overview of the different endocrine glands and helped me to classify which hormone was produced by that gland, how it affects the body. Simple pictures like this one help me to break down my learning by starting with a broad overview of the subject at hand.  Once I get the basics down pat it allows me to go into the fine details with a better understanding.



Endocrine System GlandHormone ProducedEndocrine System Function
Pituitary glandAntidiuretic hormone (vasopressin)Helps kidneys to retain water and in presence of aldosterone it helps control blood pressure.
Corticotropin (ACTH)Controls production and secretion of hormones of the adrenal glands.
Human growth hormoneControls growth and development and promotes protein production.
Luteinizing hormone and follicle-stimulating hormoneControls reproductive functions that includes the production of sperm and semen, egg maturation, and menstruation. It also controls male and female sexual characteristics that includes hair distribution, muscle formation, skin texture and thickness, voice, and may even control personality traits.
OxytocinIt causes muscles of the uterus and milk ducts in the breast to contract.
ProlactinIt starts and maintains milk production in the mammary glands.
Thyroid-stimulating hormoneIt causes stimulation, production and secretion of hormones of the thyroid gland.
Parathyroid glandsParathyroid hormoneIt controls formation of bones and the excretion of calcium and phosphorus.
Thyroid glandThyroid hormoneIt regulates metabolic rate of the body.
CalcitoninThe function of calcitonin in humans is still unclear but in other species, it regulates calcium balance.
Adrenal glandsAldosteroneIt helps in regulation of salt and water balance by retention of salt and water and excretion of potassium. Read more on functions of adrenal gland.
CortisolIt has widespread effects in the whole body. It mainly has anti-inflammatory action, maintaining blood sugar level, blood pressure, and muscle strength. It also helps control salt and water balance.
Dehydroepiandrosterone (DHEA)It affects the bones, mood, and the immune system
Epinephrine and norepinephrineStimulates the heart, lungs, blood vessels, and nervous system.
PancreasGlucagonIt helps in raising the blood sugar level.
InsulinIt helps in lowering the blood sugar level, affects the metabolism of sugar, protein, and fat throughout the body.
KidneysErythropoietinStimulates red blood cell production.
ReninIt controls blood pressure.
OvariesEstrogenIt controls the development of female sex characteristics and the reproductive system.
ProgesteronePrepares the lining of the uterus for implantation of a fertilized egg and readies the mammary glands to secrete milk.
TestesTestosteroneIt controls the development of sexual characteristics in men and the reproductive system.
Digestive tractCholecystokininIt controls the gallbladder contractions that cause bile to enter the intestine and stimulates release of digestive enzymes from the pancreas.
Glucagon-like peptideit increases insulin release from the pancreas.
GhrelinIt controls the growth hormone release from the pituitary gland and causes sensation of hunger.
Adipose (fat) tissueResistinIt blocks the effects of insulin on muscle.
LeptinIt controls appetite.
PlacentaChorionic gonadotropinStimulates the ovaries to continue releasing progesterone during early pregnancy.
Estrogen and progesteroneIt helps keep the uterus receptive to the fetus and placenta during pregnancy.

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