ANTH 1001 : Anthropology 1001 Test 2 Material
Document Summary
Interaction with natural selection and mutation means that populations may show different adaptions to the same environmental stress. Natural selection advantage to variation in skin pigment. Reduces likelihood or skin cancer and degradation of folate. Adaption to low temperature environment: body shape: bergmann"s rule: body mass is higher in areas with lower temperatures, allen"s rule: length of arms and legs are shorter in areas with lower temperatures. Ideal shapes: low temperatures: a globe (high mass) high temperatures: a stick (less body mass) Adaption to low temperature environment: metabolism and blood flow: adaptions to thermal stress collectively demonstrate developmental acclimatization"s. Efficient vasoconstriction: maintain higher temperature in fingers and toes. **basal metabolic rate: rate of cell"s activity after a period of resting** Thursday, march 3rd, 2016: hypoxia: low atmospheric oxygen levels that are a result of stress of high altitudes, delivery of oxygen to tissues: oxygen transfers between "compartments" of the body by diffusion, oxygen.
