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

Taxonomy, Agroup of realated genera are classified as-?

Agroup of realated genera are classified as-?

How are animals divided according to their digestive process, Q. How are an...

Q. How are animals divided according to their kind of digestive process? At a distance from sponges that do not have a digestive cavity where extracellular digestion takes plac

Digestive system, identify structural modifiactions of the stomach and smal...

identify structural modifiactions of the stomach and small intestine walls that enhance the digestive processes in these regions

Explain the management of renewable resources, Explain the Management of Re...

Explain the Management of Renewable Resources? Since the human population has grown, human impacts on the resources that we use, like fisheries and forests, have continued to g

Effect of somatostatin for the pancreatic hormonal secretion, Q. What are t...

Q. What are the effects of somatostatin for the pancreatic hormonal secretion? Somatostatin inhibits both glucagon and insulin secretions.

Radiographic evaluation - criteria for endosteal implants, Radiographic Eva...

Radiographic Evaluation - criteria for endosteal implants Surgical and interventional imaging involves imaging the patient  during and immediately after surgery and during the

How are sponges characterized, Q Sponge identity card. How are sponges char...

Q Sponge identity card. How are sponges characterized according to example of representing beings, basic morphology, type of symmetry, embryonic (germ) layers and coelom, digestive

Lymph, Why lymph is also called middle man of body

Why lymph is also called middle man of body

State the purposes of dressing, PURPOSES OF DRESSING A dressing can hav...

PURPOSES OF DRESSING A dressing can have a number of purposes, depending on the type, severity and position of the wound, although all purposes are focused towards promoting re

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