ANT 100 Lecture Notes - Lecture 9: Red Blood Cell, Homeostasis, Hemoglobin
Document Summary
Stress - anything interfering with normal functioning of humans, focused more on environmental stress. Homeostasis - normal functioning (body temperature, etc) Capable of short term adjustments in our physiology/behavior to adjust to environmental stressors. Variability hypothesis: calls attention to the fact that we have not lived in just one environment and are adaptable to all types (hot, cold, dry, etc) Every evolution we have made have been during times of changing climates. Among mammals of similar shape, larger mammal loses heat less rapidly than smaller mammal. Among smaller sized mammals, mammal with linear shape with lose heat more rapidly than mammal with nonlinear shape. Better to be large to live in a cold environment. Mammals in cold climates tend to have short, bulkier limbs. Mammals in hot climates tend to have long, slender limbs. Physiological - short term, reversible; sweating and having a fever. Short term: increase in breathing/heart rate, decline in food digestion efficiency, tanning.
