1. You’re riding your bike in the bike lane through Golden GatePark. Suddenly, you drift out of the bike lane and into automobiletraffic. Fortunately, you quickly move back into the bike lane andcontinue toward Ocean Beach. This scenario is a metaphor forhomeostasis, where the controlled condition (physiologic variable)is the position of the bike on the road (e.g., inside or outsidethe bike lane). Identify: (a) The established set point for thecontrolled condition (b) The receptor (c) The control center(integration center) (d) The effector There’s no need to explainthe physiology of vision or muscle contraction. Rather, demonstrateyour understanding of feedback systems by mapping the components ofa feedback system onto this scenario.
2. The three-dimensional shape of a protein determines itsfunction. Briefly explain these terms as they relate to proteinshape and provide a supporting example for each: denature,conformational change, genetic mutation. Each example must includea specific protein.
3.Compare and contrast simple diffusion and facilitateddiffusion. In other words, how are they similar and how are theydifferent? Provide supporting examples for each.
4.(a) What is the osmolarity of a solution containing 85 mMC6H12O6, 120 mM KCl, and 24 mM CaCl2? Show your calculations. (b)What would happen to human blood cells put in the solution above?Explain.
