BIO210Y5 Lecture Notes - Lecture 13: Adrenocorticotropic Hormone, Adipose Tissue, Sweat Gland
Document Summary
Additive effects: net result is greater than effect of each acting alone. Example: enhancement of glucose-sparing action of gh in presence of glucocorticoids. Permissive effects: first hormone is needed for second hormone to produce its effect. Epinephrine cannot change rate of energy consumption in a tissue unless normal levels of thyroid hormones are present. Integrative effects: hormones produce different but complementary effects in specific tissues and organs. Increasing blood pressure and volume => stretch receptors in heart cause the release of natriuretic peptides. Na+ and water loss from kidneys => increase fluid loss. Erythropoietin released => increase red blood cell production. Renin released => activation of renin-angiotensin-aldosterone system (raas) Insulin: allows for the passage of glucose and amino acids across plasma membranes. Parathyroid hormone + calcitrol: promote the absorption of calcium salts for deposition in bone. Calcitonin: increase rate of deposition of calcium salts in bone. Thyroid hormones: required for development of nervous system.
