BIO270H1 Chapter Notes - Chapter 1: August Krogh, Phenotype, Homeostasis
Document Summary
Physiology has implications for evolutionary change in genotype. Physiological processes obey laws of physics and chemistry. Electrical laws neurons and function of membrane. Chemical laws temperature and physiological processes. Physical laws body size and physiological processes. August krogh principle every biological problem has an organism that is best suited for the study. Concentration, heat and pressure go from high to low. Amount diffused across surface is proportionate to area of surface and. 2) inversely proportionate to distance it must diffuse. Diffusion rapid across short distances and extremely slow over long distances. Explains why larger animals need a circulatory system. Temperature has a profound effect on all processes in all biological levels of organization. Body size has effects on physiological processes. Isometric physiological change proportionate to body size. Allometric physiological change not proportionate to body size. Convergent evolution unrelated to taxa similar in phenotype. Parallel evolution evolved in same way in different lineages.
