Hormones And The Endocrine System Flashcards
What are the two basic types of hormones?
Lipid soluble steroid hormones and water soluble amino acid or peptide hormones. Water soluble hormones can’t enter the cell but lipid soluble hormones can.
What is a hormone?
Is a communication molecules that is produced by an endocrine gland they travel through the blood stream to target cells and act on target cells to initiate change.
Hypothalamus
Is nervous tissue in the brain
Pituitary gland ( the master gland)
Anterior p is endocrine tissue posterior o is nervous tissue exhibits with the hypothalamus neuroendocrine control which regulate secretion by other glands
Thyroid and parathyroid glands
T glands are located in the anterior neck region
Pt glands are in the posterior surface of the thyroid
Adrenal glands
Are on the top of each kidney
Gonads
Produce gametes ovaries in women produce ova and testes in men produce sperm
Water soluble hormones
Can’t enter a cell so they bind to a receptor in the pm activate a second messenger inside the cell triggering the pathway that leads to some cellular change
Lipid soluble hormones
Cross the pm and enter the cell cross nuclear envelope and enter the nucleus bind to signal receptors in the cell nucleus which bind to specific genes of dna, signal receptor complex activates gene expression
Oxytocin
Posterior pituitary gland in the brain nervous tissue, Peptide, regulated by the nervous system, causes contraction of the uterus and mammary gland cells, cause contraction during child birth.
Growth hormone
Anterior pituitary gland endocrine tissue, stimulates growth and metabolic functions, muscles and bone cells production of more cells, regulated by hypothalamus hormones
Prolactin
Anterior pituitary gland, endocrine tissue, protein, stimulates milk production and secretion, mammary glands, regulated by hypothalamic hormones
Thyroid stimulating hormone tsh
Anterior pituitary gland, endocrine tissue, glycoproteins, stimulate thyroid to make hormones, regulated by hypothalamic hormones
Triiodothyronine and thyroxine
Thyroid glands, in the neck, Tri has three iodines in it thy has four iodines in it, amines, stimulate and maintain metabolic processes, regulated by tsh
Calcitonin
Thyroid gland, in the neck, peptide, lowers blood calcium level, regulated by calcium in the blood.
Parathyroid hormone pth
Parathyroid glands, embedded in the thyroid, peptides, raises blood calcium level, regulated by calcium in blood.
Insulin
Pancreas, protein, lowers blood glucose level, regulated by glucose in the blood
Glucagon
Pancreas, protein, raises blood glucose level, regulated by glucose in the blood
Epinephrine and norepinephrine
Adrenal glands, adrenal medulla, top of kidneys, amines, raise blood glucose level, increase metabolic activities, constrict certain blood vessels regulated by the nervous system
Glucocorticoids and mineralocorticoids
Adrenal glands, adrenal cortex, top of kidneys, steroids, raise blood glucose level, promote reabsorption of na + and excretion of k + in kidneys, regulated by ACTH and k plus in blood