Eduprobe
Question:
It is much easier for a small animal to run uphill than for a large animal, because
Small animals have a lowerO2requirement.
It is easier to carry a small body weight.
The efficiency of muscles in large animals is less than in the small animals.
Smaller animals have higher metabolic rate.
Solution:
Small animals use more metabolic energy per unit mass than large animals to run on a level surface. If the cost to lift one gram of mass one vertical meter is constant, small animals require proportionally smaller increases in metabolic cost to run uphill.