APK 3110C Lecture Notes - Lecture 4: Somatostatin, Thyroid Hormones, Dynamic Structures
5 Mar 2018
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Document Summary
One of the body"s two major control systems. Maintenance of electrolyte, water, and nutrient balance of the blood. Endocrine organs are small and widely scattered throughout the body. Neuroendocrine organ: along with neural functions, produces and releases hormones a. Example: hypothalamus, pancreas, gonads, and placenta contain endocrine tissue. Autocrine: chemicals that exert their effects on the same cells that secrete them. Certain prostaglandins released by smooth muscle cells cause. Certain prostaglandins released by smooth muscle cells cause those smooth muscle cells to contract. Paracrine: act locally (within the same tissue)-- but affect cell types other than those releasing the paracrine chemicals. Somatostatin released by one population of pancreatic cell inhibits the release of insulin by different population of pancreatic cells. Difference between a hormone and a paracrine a. Hormones released into blood and transported throughout the body; paracrine act locally (within the same tissue) Chemical structure of a hormone determines how it acts.
