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Flashcards in Adaptations Deck (10)
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1

Altitude Acclimatisation

Hypoxic ventilatory response
Higher heart rate
Inactive capillaries open
More blood in tissues in lungs

2

Altitude Adaptations

Larger lung capacity
Larger chest dimensions
Shorter stature
Elevated haemoglobin levels
Higher resting ventilation rate
Fetal oxygen transport more efficient

3

Ethnic Tibetans

Have 78% differentiation in haemoglobin levels in blood than Han Chinese - only diverged 5000 years ago

4

Heat Adaptations

Lower core temperature
Favourable body proportions
Sweat glands

5

Heat Acclimatisation

(1-8 weeks)
1. Increased plasma and blood volume
2.Low sodium sweat
3. Lower threshold for sweating and vasodilation
4.Reduced heart rate (with more efficient beating)
5. Reduced metabolic rate
6. Re-absorption of sweat
7. Lower core temperature

6

Cold Adaptations

Narrow nose
Higher core temperature
Higher resting metabolic rate
Hunters waves

7

Cold Developmental Adjustments

Favourable body proportions
Muscle
Subcutaneous fat

8

Cold Acclimatisation

(5-10 days)
Lower core temp
Delayed shivering
Non-shivering thermogenesis

9

Behavioural Responses to Heat

Avoiding the heat
Finding shade
Drinking water
Dressing appropriately
Avoiding excessive work or exercise

10

Behavioural Adaptations to Cold

Avoiding cold
Dressing warmly
Avoiding water