CELL PHYSIOLOGY Questions and Answers

What are the Attachments between cells that permit intercellular communication Ans- Gap Junctions What are the Channel proteins that permit communication in gap junctions Ans- Connexins What Prevents paracellular movement of solutes between cells Ans- Tight junctions (zonula occludens) What are the three factors that increase permeability of a solute in a membrane Ans- Increased oil/water coefficient of the solute (more lipophilic) Decreased size of the solute Decreased membrane thickness What are the Three types of carrier-mediated transport Ans- Facilitated diffusion, primary active transport, and secondary active transport (antiport/symport) What Is facilitated diffusion active or passive? Ans- Passive (down its concentration gradient with the help of a carrier protein) What are the Glucose transport into muscle and adipose is an example of which type of transport