Heat loss, Biology

Assignment Help:

Heat Loss

Temperature regulation is extremely uneconomical if it depends only on variations in metabolism. Therefore, mechanisms for losing excess heat have been developed by both birds and mammals. In an aquatic environment, the entire heat transfer between the animal and the media is through conduction. However, in terrestrial habitat, only small amounts of heat are exchanged this way. Most of the Homeotherms are terrestrial.

In man, heat loss due to radiation accounts for about 55% and heat loss due to evaporation is about 44%. The amount of heat loss depends on the ambient temperature and the humidity. Loss of heat by radiation and conduction is usually effective in a cool environment. Whereas, at high temperature, the animals will actually receive heat by these routes. Evaporation however, is always negative factor and it requires considerable energy expenditure. For instance, to vaporise one gram of water from the moist surfaces of the skin or respiratory epithelia, 0.6 kcal is required. This technique of cooling has been exploited in quite different ways by birds and mammals.


Related Discussions:- Heat loss

Explain the use of trichomoniasis in pregnancy, Use of trichomoniasis in pr...

Use of trichomoniasis in pregnancy Trichomoniasis in pregnancy has been associated with adverse pregnancy outcomes (D Soper, Am J Obstet Gynecol 2004; 190:281). Metronidazole

Glucose-6-phosphate to glucose, Glucose-6-phosphate to Glucose Glucose...

Glucose-6-phosphate to Glucose Glucose-6-phosphate to Glucose : Glucose-6-phosphate  is converted to glucose  by glucose-6-phosphatase which is present in intestine, liver and

What is the difference between spermatids and sperm cells, What is the diff...

What is the difference between spermatids and sperm cells? What is the name of the transformation of spermatids into sperm cells? Sperm cells (the male gametes) are matured spe

Homeostasis, why should shivering contribute to heat gain in the body?

why should shivering contribute to heat gain in the body?

Structure of water, STRUCTURE OF WATER It may interest you to know that w...

STRUCTURE OF WATER It may interest you to know that water is a universal solvent and is a major constituent of all living organisms. Earth is the only planet where water exists i

Endocrine glands - kidney, KIDNEY S - Origin . They develop from the ...

KIDNEY S - Origin . They develop from the mesoderm of the embryo. The kidneys secrete three hormones: renin, erythropoetin and calcitriol. (i) Renin . Whenever the rat

Biotechnology, Clonig,plasmid vectors,lambda&M13based vectors

Clonig,plasmid vectors,lambda&M13based vectors

Heat loss, Heat Loss Temperature regulation is extremely uneconomical...

Heat Loss Temperature regulation is extremely uneconomical if it depends only on variations in metabolism. Therefore, mechanisms for losing excess heat have been developed by

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd