BIO210Y5 Lecture 13: Parathyroid gland--Lecture 13B
Document Summary
Parathyroid gland: positioned on the posterior surface of the thyroid gland. Secretion of parathyroid hormone pth, and calcitonin. Control over osteoclast activity, to increase ca2+ concentration. Ca2+ absorption by intestinal tract via calcitriol: when homeostasis is disrupted. Pancreas: exocrine cells covering endocrine cells alpha and beta, alpha cells secrete glucagon, beta cells secrete insulin, function. Insulin: insert glucose to cells: glycogen: generating glucose, glucagon: breakdown of glucose, when homeostasis is disrupted (normal blood glucose levels 70-110 mg/dl) Increased rate of glucose transport into target cells. Increased breakdown of glycogen to glucose in liver and skeletal muscle. Increased breakdown of fat to fatty acids in adipose tissue. Increased synthesis and release of glucose in liver. 36112589_2/courses/fall-2016-bio210y5-y-lec0101/homeostasis. mpg: overwhelming concentrations of glucose that supress reabsorption capabilities of the kidneys, type i: insufficient insulin production by beta cells, type ii: insulin resistance, associated with obesity, hyperglycemia: high blood glucose levels, polyuria: excessive urine volume.
