BIOL 150 Lecture Notes - Lecture 39: Elastin, Thermoregulation, Collagen
Document Summary
Form and fitness trade-offs: adaptations arise from genetic traits already present. When the human body is stressed your immune system suffers example of trade-offs. Gravity limits how large an animal can be and still move/function. Smaller animals will lose heat and water more rapidly and need to eat more food per unit than larger animals. Metabolic rate as a measure of o2 use shrew has the highest mass-specific metabolic rate, while elephants have the lowest. In salmon, younger fish take in more oxygen through their skin b/c there is a smaller sa:v ratio but as the fish grows up more oxygen is breathed through their gills. Epithelial tissues- cover the outside of the body and line the inner surface of many organs (polar) Act as an interface between internal and external environments. Are responsible for forming an internal environment that is different from the external environment. Allow the internal environment to be maintained at relatively constant levels.
