Monday, October 13, 2014

Human Variation & Race

1.  At high altitudes our blood isn't capable of absorbing oxygen; we preform best at sea level.

2. The human body adapts to what is effectively oxygen deprivation by initially increasing heart rate, breathing rate, then the number of hemoglobin, then density of capillaries.
Short Term: Increased breathing rate
 
 Facultative: Exercise

Developmental: Body adapts

Cultural: Sherpa Family


3.  Benefits of studying human variations is to prepare one self to what's to come.  Info. from explorations can be used for experiments.  It can be used in a productive way such as training.

4. The inhabitants of the Himalayan mountains is a good example of their adaptations to the high altitudes of the the Himalayas.  Such as the Sherpa who inhabit the Himalayas have genetic adaptations to high altitudes.  Over generations of inbreeding showed a predominance of high-altitude genes that exist in some peoples in Asia and a set of low-altitude genes that exist in other groups of Asians.
 

1 comment:

  1. Actually, we can absorb oxygen at high altitudes, just with more difficulty. How does that impact homeostasis? This section should have been expanded.

    For short term, how does increased respiration help with hypoxia?

    Exercise is a behavior, not a physiological facultative adaptation. An example of a facultative adaptation is an increase in the number of red blood cells produced.

    Developmental: Yes, the "body adapts". The question is how does it adapt?

    Cultural: You needed to actually describe some cultural adaptations to high altitude. What behaviors or tools do Sherpa families use to help them deal with hypoxia?

    "Info." You seemed to be in a hurry when you created this post.

    The last question asked you if you could think of any way to use race to explain and understand human variation? You discuss the adaptive approach again but don't discuss the issue of race. By the way, is it really a case of "inbreeding" or natural selection?

    ReplyDelete