ANT 101 Lecture Notes - Lecture 17: Northern Hemisphere, Melanin, Melanocyte
Document Summary
Darker skin times = better protection lighter skin times = less protection. Darker skin-tones are closer to the equator (southern hemisphere) more radiation due to the tilt. Lighter skin-tones away from the equator (northern hemisphere) Usually you don"t get skin cancer after your reproductive years. Melanin prevents depletion of folic acid (prevents against birth defects) Darker skin reduces uv radiation needed to produce vitamin d. Lighter skin allows more uv radiation levels so can still synthesize. Clothing, sunscreen, spending time indoors, fortified milk. Narrowing of blood vessels, reducing blood flow and heat loss. Opening of blood vessels, increasing blood flow and heat loss. Oxygen starvation due to reduced available oxygen. He didn"t only classify animals but classified humans. He believed that humans should also fall into classification with animals. Homo ferus walking on all fours, hairy and mute, closely related to us, chimps and pigmys. Biological determinism what you look like is based upon your personality.
