ANAT 216 Lecture Notes - Lecture 20: Posterior Pituitary, Adrenal Gland, Cerebellum
8 Mar 2017
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Document Summary
Endocrine system 1 (reading material: chapter 19: pages 507-512) Definition: influence activity of all cells in body through the effects of hormones (to set in motion/to excite) considered as chemical messenger, once it"s secreted from endocrine organs, transported throughout the body through blood. Cells that make up these glands synthesize the hormone to secrete it to the surrounding tissue environment around the cells. Hormone is circulated through blood, so closely associated with endocrine glands must have a lot of blood vessels. Synthesized by cells, secrete it to surrounding tissue environment, picked up by blood. If altered protein codes for an enzyme, it alters enzymatic activit within the cell. Pituitary gland (hypophysis): resembles size and shape as a pea on the stalk (infundibulum) that connects it to the hypothalamus. Histology: 3 sections, posterior pituitary doesn"t have clusters of cells because there"s just a lot of pituicytes (dark blobs are nuclei of pituicytes, long strings of tissues represent axons and axon terminals).
