body size and metabolic rate

Question 1

define metabolism

Answer 1

sum of all chemical processes going on side a cell

Question 2

is metabolism=O2 consumption rate

Answer 2

YES

Question 3

what is the rough proportion of metabolically active parts of all organisms?

Answer 3

around 73%

Question 4

volume increases disproportionately to SA. how to large animals combat this? refer to African elephant ears

Answer 4

by changing body shape to increase surface area