Endocrine System Flashcards
Made up of organs and glands that produce, store and release hormones.
Endocrine System
Regulates chemical reactions in cells
Controls functions of tissues, organs, other cells
Hormones
By the brain
Pituitary Gland
Neck area
Thyroid gland
Middle of chest
Thymus
By kidney
Adrenal Gland
Found in the middle of small intestine
Pancreas
Release hormones into a duct to target cells
Exocrine gland
Release hormones directly into the bloodstream
Endocrine gland
Hormone release stops in response to decrease in stimulus
Negative Feedback Loop
As long as stimulus is present,action of hormone continues
Positive Feedback Loops
master gland of the endocrine system (brain)
Pituitary gland
Body growth
Growth hormone
Regulates thyroid gland
Thyroid stimulating hormone (TSH)
Growth of ova and sperm
Follicle stimulating hormone (FSH)
stimulates ovulation and testosterone in males
Luteinizing Hormone (LH)
Causes the breasts to grow and make milk during pregnancy and after birth
Prolactin
Stimulates reabsorption of water by the kidneys
Antidiuretic hormone (ADH)
Stimulates uterine contractions during labor and release of breast milk
Oxytocin
Consist of growth hormone, (TSH), (FSH), (LH), Prolactin
Anterior Secretes
Consist of antidiuretic hormone (ADH), oxytocin
Posterior secretes
Brain
Hypothalamus
Brain
Pineal gland
Regulates onset of puberty, biological clock
Melatonin
Base of the neck just below the Adam’s apple
Thyroid gland
Cellular metabolism
T3 and T4
Increase bone calcium
Calcitonin
Secretes of the thyroid gland
T3 and T4 , Calcitonin
posterior to the sternum
Thymus
Development of cells int the immune system
Thymosin
Secretes of the thymus
Thymosin
Parathyroid hormone
Parathyroid glands
Regulates calcium
Parathyroid hormone
Behind the stomach and in front of the spine
Has both endocrine and exocrine functions
Pancreas
Secretes of the Pancreas
Alpha cells, Beta Cells
Alpha cells- Glucagon
Increases blood sugar
Beta cells- Insulin
Lower blood sugar
Located on top of both kidneys
Prolonged stress inhibits the the body’s immune response by secreting cortisol
Adrenal glands
Secretes of the adrenal glands
Aldosterone, Cortisol, Epinephrine, Norepinephrine
Regulates electrolytes and fluid volume
Aldosterone
Regulates carbohydrates
Cortisol
Fight of flight response
Epinephrine
vasoconstriction( narrowing of the blood vessels), which increases blood pressure
Norepinephrine
Secretes of the ovaries
Estrogen, progesterone
Development of secondary sex characterteristics in females, regulates menses
Estrogen
Prepares the body for pregnancy
Progesterone
Secretes of the testes
Testosterone
Sperm production , secondary sex characteristics in males
Testosterone