Endocrine Flashcards
Paracrine
Local effects but not on the cell that secretes the chemicals
Autocrin
Chemicals that exert their effects on the same cells that secrete them
Hormone
Chemical substances secreted by cells into extracellular fluids
Leukotrienes
Signal chemicals involved with inflammation
Prostaglandin
Multiple targets and effects, Dilation or constriction of smooth muscle, Enhance pain
Mechanisms of Hormone Activity
Alter target cell activity Open or Close membrane Ion Channels Stimulate protein synthesis Activate/Deactivate enzymes Stimulates Mitosis
List Non-Polar Hormones
Steroids
Thyroid Hormones
List Polar Hormones
Insulin
Epinephrine
Amino Acid Based (mostly)
Pancreas
List hormones, Actions, What it’s regulated by
Insulin - Lowers blood glucose, regulated by blood glucose
Glucagon - Raises blood glucose, regulated by blood glucose
Adrenal Medulla
Epinephrine and Norepinephrine - Raise blood glucose level; increase metabolic activities;constrict certain blood vesses, regulated by nervous system
Adrenal Cortex
Glucocorticoids - Raise blood glucose level, regulated by ACTH
Mineralocorticoids - Promote reabsorption of Na+ and excretion of K+ in kidneys, regulated by K+ in blood and angiotensin II
Testes
Androgens - Support sperm formation; promote development and maintenance of male secondary sex characteristics, regulated by FSH, LH
Ovaries
Estrogens - Stimulate uterine lining growth; promote development and maintenance of female secondary sex characteristics, regulated by FSH, LH
Progestins - Promote uterine lining growth, regulated by FSH, LH
Pineal Gland
Melatonin - Involved in biological rhythms, regulated by light/dark cycles
3 steps of membrane receptor activity
- Reception
- Transduction
- Response