BIOL 206 Study Guide - Final Guide: Glut4, Glycogen, Beta Cell
Document Summary
Process: absorption of water soluble nutrients is challenging, the intestinal epithelium can transport glucose up the concentration without directly using atp. Using a transport protein (facilitated diffusion) diffuse using concentration gradients but diffusion is facilitated by protein in this case glut-2 transport protein: how does extracellular digestion work?\ Extracellular digestion- 2 way digestive system (gastrovascular cavity)- Gastrodermal cells secrete digestive enzymes and phagotize partially digested macromolecules. Intracellular digestion completes the hydrolysis of nutrients: what is the other major function of the gastrovascular cavity?---functions for food digestion and transport of nutrients throughout the body. Glucose uptake (facilitated diffusion) is regulated by the hormone insulin. At low concentrations of insulin, few glucose transporters are on the plasma membrane. Liver breaks down glycogen and releases glucose into the blood. Body cells take up more glucose---liver takes up glucose and stores it as glycogen. Blood glucose level declines to a set point stimulus for insulin release diminishes.
