Homeostasis , Biology

Assignment Help:

Homeostasis

Homeostasis may be defined as the maintenance of constancy in the internal environment of the organism. This is essential for maintenance of life. Without homeostatis life ceases to exist. For example, your blood cells will cease to work and will be dead unless they are bathed in a medium which closely approximates blood in its composition. Your body works in such a manner that the blood composition always remains much the same.

Maintenance of this harmony is due to homeostasis. The regulation of our body temperature is also an example of the operation of homeostasis mechanisms. When our body temperature rises beyond 37° C, the body senses the rise in temperature by special cells in the brain which function like a thermostat. The cells send nerve impulses to the sweat gland to increase sweat secretion. The evaporation of the sweat from the body surface lowers the body temperature; other nerve impulses cause dilation of the small blood vessels (capillaries) in the skin making it look flushed. The increased blood flow brings more heat to the body surface to be radiated away. Non living objects do not possess such a system.


Related Discussions:- Homeostasis

Describe cell-mediated immunity, Cell-mediated immunity:  The immune reacti...

Cell-mediated immunity:  The immune reaction directed against the body cells which have been infected by viruses and bacteria; and are controlled by T cells.

Explain somatic cell, For a somatic cell with 2n = 4, which of the followin...

For a somatic cell with 2n = 4, which of the following is true? (Note: G1- growth phase 1, G2 - growth phase 2, M - metaphase, P - prophase and T - telophase) a.  (Number of

Determine the organs of the digestive system of earthworms, Which are the c...

Which are the characteristics and organs of the digestive system of earthworms related to the type of diet of these animals? Earthworms eat decomposing organic material and sma

Eye muscles, MUSCLES - In eye orbit, eye ball is fixed by 6 skeletal...

MUSCLES - In eye orbit, eye ball is fixed by 6 skeletal muscles attached to 3rd, 4th & 6th cranial nerves (motor). 4 - straight or recti muscles are present. 2 - oblique

Heparin, HE P ARIN It is highly sulphated mucopolysaccharide made ...

HE P ARIN It is highly sulphated mucopolysaccharide made of alternate units of glucosamine and glucuronic acid. Heparin is mainly produced by liver and mast cells. I

Explain phenetic classification, Phenetic Classification This system is ...

Phenetic Classification This system is based exclusively upon face value of observed characters without direct reference to phylogeny. The taxa are either classified on the basi

Which is structural isomers, Structural isomers: Select one: a. Have ...

Structural isomers: Select one: a. Have the same molecular weight b. Have the same connectivity c. Are mirror images d. All of the above e. None of the above

What do you mean by dengue, Q. What is dengue? The Dengue, or dengue fe...

Q. What is dengue? The Dengue, or dengue fever, is an epidemic disease in some countries (for instance, in Brazil), and its most dangerous form is hemorrhagic dengue. It is cau

Define about the pancreatic cancer, Define about the Pancreatic Cancer? ...

Define about the Pancreatic Cancer? This is a condition often associated with abdominal pain, anorexia, nausea, and vomiting and weight loss. Ealing may aggravate pain. There m

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