Final BIOS 251 week 8 tested and verified questions and answers

Final BIOS 251 week 8 tested and verified questions and answers Components of the homeostatic control loop - CORRECT ANSWER-receptor, control center, effector Negative feedback - CORRECT ANSWER--works to oppose change -brings condition back to a set point Positive feedback - CORRECT ANSWER--works to enhance change -brings condition further away from a set point Tonicity - CORRECT ANSWER-relates to how the solution influences the shape of body cells Hypotonic solution - CORRECT ANSWER-RBC undergoes hemolysis (swelling) Hypertonic solution - CORRECT ANSWER-RBC undergoes crenation (shrinking) Osmosis - CORRECT ANSWER--concentration of solutes per liter -water moves from high concentration of water to low concentration of water Factors that influence diffusion across a cell membrane - CORRECT ANSWER-- steepness of concentration gradient -temperature -mass of diffusing substance -surface area -diffusion distance Passive processes that move substances across the cell membrane - CORRECT ANSWER--Simple diffusion -Facilitated diffusion Osmosis processes that move substances across the cell membrane - CORRECT ANSWER--Active processes -Active transport -Vesicular transport Primary active transport - CORRECT ANSWER-energy derived from ATP changes the shape of a transporter protein which pumps a substance across a plasma membrane against its concentration gradient