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19 Apr 2019

Body temperature regulation of warm-blooded animals is based onthe activity of mitochondria. What is the normal function of theseorganelles, and how does that help with body temperature?

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Related questions

Smaller mammals and birds have faster heart rates than larger ones. It would be useful to have a model that might explain this variation in heart rates. A warm-blooded animal uses large quantities of energy in order to maintain body temperature, because of heat loss through its body surface. Since cold-blooded animals require very little energy when they are resting, the major energy drain on a resting warm blooded animal seems to be maintenance of body temperature. Let’s explore a model based on this idea. The amount of energy available is roughly proportional to blood flow through the heart to the lungs – the source of oxygen. At rest, the amount of energy available is proportional to the amount of heat lost, which is proportional to body surface area. (a) Show that the basal (resting) blood flow f is related to the body weight w by (approximately) f ∝ w 2/3 . Define all the variables that you use. (b) Derive a model that relates basal pulse rate p to body weight w as (approximately) p ∝ w −1/3 . What assumption(s) did you make about hearts?

Warm blooded animals like us keep their temperature constantirrespective of their surroundings. But how do they do that? Energyshould be supplied from the inside. I assume that reactions likemaking ATP from glucose are exothermic. That means in winter ourbody reacts more. Water is absorbed by those reaction.We shouldneed more water in winter. Which is contradictory with our reallife experience.

On the other hand what prevents cold blooded animals from makingheat? Don't they need ATP? Do they use different types of reactionsto make energy? Do they have different evolutionary path? Theydon't seems very different from us.

Allen's rule is a biological rule that states that the limbs of warm blooded animals that live in colder climates are different than the limbs of the same species of animals in warmer climates. In what way do you expect them to be different and why?

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