BIOL 224 Lecture Notes - Lecture 3: Homeostasis
Document Summary
Physiological processes (obey the lays of physics and chemistry) Effected by temperature: > small animals lose heat faster than larger animals because higher sa/v , thus why small animals need to have a faster metabolic rate. Ex: as body weight increases in animals metabolic rate decreases. Body volume determines how many cells can. Sa/v = surface area / volume : important in physiology because some properties vary in relation to volume (body mass) as others will vary in relation to surface area. Ex: heat production (v) vs. heat dissipation (sa) Large animals require structural adaptations to enhance exchange with the environment. The physiological phenotype is a product of the genotype and the environment: A single genotype realists in more than one phenotype. Acclamation results in reversible phenotypic changes (when predator leaves they switch back to normal, b to a in slideshow images) Know differences of **animals in water vs. air* *
