SCI227 Lecture Notes - Lecture 15: Thyrotropin-Releasing Hormone, Parathyroid Gland, Thyroid
Document Summary
Metabolism: refers to all the chemical reactions that occur within a cell to support & sustain its life. Glands that affect metabolism: there are 3, thyroid, parathyroid, anterior pituitary. Involves the thyroid gland: thyroid gland, located at the base of the neck, regulates: Calcium levels in the blood: produces , (t3) triiodothyronine & (t4) thyroxine, calcitonin, t3 & t4. Increase the rate fats proteins and glucose are metabolized (rate they are used to make hormones, tissues etc. ) Increase in the rate of cellular respiration in the heart, skeletal muscles liver and kidney ( raising body temperature) Influences organization of cells into tissues in early development. If these levels get too high the whole feedback loop will stop. Thyroid disorders: there are 3, hyperthyroidism, hypothyroidism, goiter, hyperthyroidism (graves disease, cause: High levels of t3 & t4 in the blood: effect: Oxidation of glucose is fast: symptoms: Weight loss, muscle weakness, anxiety, sweating & bulging eyes: hypothyroidism, cause:
