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 hypertensive response, Q. Explain Hypertensive Response? Hypert...

Q. Explain Hypertensive Response? Hypertension at rest has long been known to be a risk factor for the development of coronary artery disease (CAD). Significant elevation of B

A disulfide bond can form between any two amino acids, A disulfide bond can...

A disulfide bond can form between any two amino acids that have sulfur in their side-chain.

What are the maintenance sequences of implant, Maintenance sequences of imp...

Maintenance sequences of implant Achieving a successful result with the treatment is only half the battle won. The main challenge is maintain that result over a long period of

Transport proteins and under the same concentration gradient, Q. with no sa...

Q. with no saturation of transport proteins and under the same concentration gradient how can the speed of simple diffusion is compared to the speed of facilitated diffusion? T

#nervous system, 6. What is the function of the myelin sheath? Do all axons...

6. What is the function of the myelin sheath? Do all axons present a myelin sheath?

Which are specialized conductive tissues of the plants, Which are specializ...

Which are specialized conductive tissues of the plants? Vascular tissues of the plants are the phloem and the xylem. The Xylem is the plant tissue that forms the vessels that c

Characteristics of man, CHARACTERISTIC S OF MAN - Humans posses ere...

CHARACTERISTIC S OF MAN - Humans posses erect posture and bipedal locomotion. Humans possess large sized brain. Humans are less dependent on smell. Humans possess

Define miscellaneous functions of protein, Define Miscellaneous Functions o...

Define Miscellaneous Functions of Protein? Besides the functions enumerated above certain other important miscellaneous functions of proteins are included herewith. These inclu

What is fluoride inhibitor, Fluoride Inhibitor Fluoride inhibits  enola...

Fluoride Inhibitor Fluoride inhibits  enolase enzyme involved in the conversion of 2-phosphoglerate  to phosphoenol pyruvate.

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