PLN 203 Chapter Notes - Chapter 18: Growth Factor, Posterior Pituitary, Colloid
6 Feb 2016
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Chapter 18. 1 homeostasis is preserved through intercellular connection. Most are synthesized as prohormones they are secreted. Inactive molecules converted to active hormones before or after. Proteins are more than 200 amino acids long and have carbohydrate side chains. Antidiuretic hormone (adh) = vasopressin and oxytocin (oxt) (each 9 amino acids long) Growth hormone (gh; 191 amino acids) and prolactin (prl; Hypothalamus, heart, thymus, digestive tract, pancreas, and posterior lobe of the pituitary gland, as well as several hormones produced in other organs. Paracrine factors that coordinate cellular activities and affect enzymatic processes (such as blood clotting) in extracellular fluids. Some eicosanoids (such as leukotrienes) have secondary roles as hormones. A second group of eicosanoids - prostaglandins - involved primarily in coordinating local cellular activities. In some tissues, prostaglandins are converted to thromboxanes and prostacyclins, which also have strong paracrine effects. The reproductive organs (androgens by the testes in males, estrogens and progestins by the ovaries in females)
