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

Vital signs of clinical evaluation, Vital Signs of clinical evaluation ...

Vital Signs of clinical evaluation Patient's clinical evaluation starts with the examination of certain vital signs which are: B.P. (Take average of two regarding with atlea

Simple indigestion, S i m p l e indigestion The disease is common ...

S i m p l e indigestion The disease is common in stall-fed individuals. Consumption of indigestible food material, moldy and nutritionally unbalanced feed results in simpl

Explain the occurrence of vitamin B6, Explain the Occurrence of vitamin B 6...

Explain the Occurrence of vitamin B 6 Vitamin B 6 activity is attributed to the 3 compounds-pyridoxol (pyridoxine), pyridoxal and pyridoxamine, generally comprised in the vit

Point and non-point sources, Point and Non-Point Sources The discharg...

Point and Non-Point Sources The discharge of effluents in receiving water body at a specific site are referred to a point sources in contrast to the inflow of pollutants in a

Trends in succession - ecology, Trends in Succession - Ecology Success...

Trends in Succession - Ecology Succession is an important aspect of change in ecosystems and a simple description of successional communities the beginning of the story. We ne

Synthesis of citratefrom acetyl coa and oxaloacetate, Synthesis of citratef...

Synthesis of citratefrom acetyl CoA and oxaloacetate: Citrate synthase catalyses this aldol condensation reaction with the release of CoA. There are certain inhibitors to  this re

How many chambers does the fish heart have, Q. How many chambers does the f...

Q. How many chambers does the fish heart have? The fish heart is a tube made of two consecutive chambers such as one ventricle and one atrium.

Define classification of carbohydrates - polysaccharides, Define classifica...

Define classification of carbohydrates - Polysaccharides? This classification is based on the number of monosaccharide units they contain, Polysaccharides are those polymers of

Explain a prosthetic considerations, Prosthetic Considerations The comp...

Prosthetic Considerations The complete aesthetic diagnosis of the patient should be done prior to implant placement in the aesthetic zone. The smile line of the patient is crit

What is ridgemapping, What is Ridgemapping The patient is given local ...

What is Ridgemapping The patient is given local anesthesia by infiltration to numb both the  facial (labial/buccal) and  lingual (palatal) mucosa. Using either a sharp straigh

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