Nonshivering thermogenesis, Biology

Assignment Help:

Nonshivering Thermogenesis

The nonshivering thermogenesis is a widespread phenomenon in mammals. It refers to the processes that produce heat by means other than shivering. It is not certain whether birds produce heat by nonshivering. One of the well-known sites of nonshivering thermogenesis in mammals is the brown adipose tissue, also called brown fat.

1592_Nonshivering Thermogenesis.png

Figure: Brown fat deposition in the bat

The brown adipose tissue contains great numbers of mitochondria and is richly vascularised. Release of norepinephrine into the tissue by the sympathetic nervous system results in a great increase in oxidation of lipid and release of heat. Brown fat, like nonshivering thermogenesis is specially prominent in new born individuals, hibernators and cold acclimated adult mammals. The brown fat tends to occur in discrete masses, located in the neck, interscapular region, axillae and abdomen. Among hibernators brown fat is believed to help in rewarming the body during emergence from hibernation. New born mammals use brown fat in routine thermogenesis. The principal mechanism of heat production by brown fat is by uncoupling the oxidative phosphorylation that occurs in the mitochondria. Thus, oxidation of food-stuffs results in the production of heat.


Related Discussions:- Nonshivering thermogenesis

Genital warts and human papillomavirus infection, Genital warts and human p...

Genital warts and human papillomavirus (hpv) infection External genital warts are caused by human papillo- mavirus, usually type 6 or 11; other types (16, 18 and others) cause

How does the cellular immune response take place, Q. How does the cellular ...

Q. How does the cellular immune response take place? The lymphocytes that participate in the cellular immune response are the T lymphocytes and T lymphocytes differentiate into

Explain monascus species, Explain Monascus species Most of the reports ...

Explain Monascus species Most of the reports of food colourants from microbial sources involve Monascus species, particularly Monascus purpureus, followed by  Rhodotorula speci

Define supplementary feeding to control under nutrition, Define Supplementa...

Define Supplementary feeding to control under nutrition? Supplementary feeding has remained an important component to control under nutrition. Considering the dietary inadequac

Explain about selection of healing abutment, Selection of healing abutment ...

Selection of healing abutment It is done depending upon the tissue thickness. Tissue thickness can be measured similar to ridge mapping or sounding procedure, wherein after an

Relate mitochondria organelles with eukaryotic cells, Relate Mitochondria o...

Relate Mitochondria organelles with eukaryotic cells Mitochondria are highly specialised organelles in eukaryotic cells. These perform the energy transducing process, and are o

Explain about the spinal trauma, Explain about the Spinal Trauma? Spina...

Explain about the Spinal Trauma? Spinal trauma or spinal cord injury, commonly clue to accidents, fills, sports injury can result in serious disabling consequences. The spinal

Hormones secreted by thyroid gland, Hormone s . The thyroid gland secretes...

Hormone s . The thyroid gland secretes following hormones. Thyroxine (tetraiodothyronine or T 4 )' and tri-iodothyronine or T 3 are secreted by the thyroid follicular cells.

What are the typical fauna of the temperate forests, What are the typical v...

What are the typical vegetation and the typical fauna of the temperate forests? In the temperate forest deciduous trees predominate. Mammals are originated in great number, as

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