Biol 235 - Physiology Lab Questions And Answers 100% Verified A+ Guaranteed

how can cells create a difference in chemical concentrations between ICF and ECF {Ans: use pumps to move things against their gradient use energy}define receptor {Ans: a molecule that can "sense" an external stimulus and sends that communication forward}3 membrane modifications we talked about {Ans: lipids: creates compartments for endo and exocytosis cholesterol: affects fluidity and permeability proteins: affects how cells function based on environmental signals because they are the transporters and receptors that allow for things to cross the membrane}define chemical disequilibrium in membranes {Ans: there are more Na, Ca and CL molecules outside the cell there are more K+ and large anions inside the cell}what types of transport require energy {Ans: active transport: moving things against gradient because molecules, or either too large, or not polar bulk transport: endo/exocytosis for transporting big and bulk molecules}what types of cell transport does not require energy {Ans: osmosis: movement of water across membrane simple diffusion: small and nonpolar molecules down gradient facilitated diffusion: large and polar molecules down gradient}