Biol exam 3 04/16

Oxygen Deprivation and Brain Function

  • Definition of Brain Fog: Temporary cognitive impairment often linked to oxygen deprivation.
  • Oxygen Levels: Brain operates at a specific level; changes in oxygen supply can affect function.
    • Analogy: Like using high octane vs low octane gasoline in a car.
  • Environmental Changes: Rapid changes in elevation (e.g., moving from sea level to high altitude) lead to symptoms due to body adaptation limits.

Adaptation to Altitude

  • Bird Behavior: Distinction between resident birds (native) and migratory birds (temporary).
    • Resident Birds: Adapt by increasing hemoglobin content in blood, allowing better oxygen transport under low oxygen conditions.
    • Migratory Birds: Adapt quickly by increasing red blood cell production to handle immediate oxygen needs, leading to increased blood viscosity.
  • Human Response: Similar to migratory birds; rapid ascent can cause altitude sickness due to inadequate acclimatization.
  • Symptoms of Altitude Sickness: Similar to flu, including headache, fatigue, and nausea.
  • Remedies: Oxygen bars, supplemental oxygen from grocery stores, slower acclimatization to high altitudes.

Genetic Variations and Oxygen Binding

  • Alleles: Variants of genes that affect traits, including