ANFS 345 Study Guide - Midterm Guide: Autocrine Signalling, Iodine, Cortisol

• School: University of Delaware
• Department: Animal and Food Sciences
• Course: ANFS 345
• Professor: Ryan Arsenault

Document Summary

Products made by one cell move to signal an effect in same cell or distant cells. Requires receptor for signal molecule on cell membrane of target tissue/organ. Signaling pathways classified by distance of activity. Some tissues make only 1 signal molecule, some make many signals. Parathyroid gland), some make signals while performing other functions (pancreas) Target cells may have receptors for & respond to more than 1 signal. Magnitude of effect depends on hormone concentration and # receptors on target cells - concentration has to do with number of receptors able to get signal. Exocrine glands secrete to a body surface (skin, gi tract) via ducts. Endocrine glands secrete to bloodstream to circulate in body. Function: produce hormones, signaling molecules that travel via blood stream to act on target organs elsewhere in the body. Even adipose (fat) acts as an endocrine organ!