3.3.1 Surface area:volume Flashcards

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1
Q

Single celled organisms

  • type of oxygen diffusion?
  • high or low SA:V?
A
  • direct diffusion of oxygen

- Very high SA:V - absorbs oxygen through its membrane

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2
Q

Flatworm

  • diffusion of oxygen?
  • high or low SA:V?
A
  • direct diffusion
  • Flat, short diffusion distance
  • High SA:V
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3
Q

Small mammal

A

Use lungs and circulation

  • High SA:V, loses more heat per gram of body
  • faster rate of respiration, maintain constant body temp.
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4
Q

Big mammal

A

Uses lungs and circulation

Smaller SA:V , loses less heat per gram of body, slower rate of respiration/ uses less O2

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