BIO 2110 Lecture 15: Lecture 15 - Endocrine systems
22 Mar 2017
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Document Summary
Evaluated input from sensor and send signal to effector. How many parts are in the feedback loop determines order. We talk mostly of second order and pituitary gland today. Synthesized in cell body, travel in vesicles down axons. Induces smooth muscle contractions in uterus = important in birth. High blood osmolality and low blood volume --> increase water retention. Hypothalamus neurohormones --> hypothalamic-pituitary portal systems --> anterior pituitary releases hormones. Depends on how many thing substituted on the rings. Key function in regulating energetic balance (hyper higher vs hypothyroidism lower metabolic rate) More trh acts not only as releasing hormone but also stimulates follicle growth. Increasing the tropic hormone secretion to make up for low t3 t4. Stimulation of receptors by antibodies result in synthesis of thyroid hormones. Antibodies keep binding to the tsh receptor to activate it. Negative feedback doesn"t work because acceptors constantly triggers. Increase blood glucose level - to better deal with the stress.
