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

Draw a section of the microscopic structure of human retina, Draw a section...

Draw a section of the microscopic structure of human retina and label any six parts in it. a)  Name the structure that determines the eye colour in humans. What is the normal f

Explain fats requirements during thyphoid, Explain fats requirements during...

Explain fats requirements during thyphoid Fats: Use of fats should be in moderation. This is because the typhoid patient has a compromised ability to digest and assimilate due

How physical activity affect requirement of protein, How Physical Activity ...

How Physical Activity affect requirement of protein? Research on protein needs for muscular work had its beginning in 1863 when Von Leiberg postulated that muscle protein was d

Define factor contribute to malabsorption - radiation damage, Define Factor...

Define Factors Contribute to the Malabsorption - Radiation Damage? Malabsorption of water, fats, bile salts, carbohydrates, calcium, magnesium, iron and vitamin B 12 occur dur

Explain carbonating - method of food preservation, Explain Carbonating - me...

Explain Carbonating - method of food preservation? Carbonated water is the water in which carbon dioxide gas has been dissolved under pressure. By eliminating oxygen, carbonate

In what ways does poverty lead to environmental degradation, Question 1: ...

Question 1: (a) In what ways does poverty lead to environmental degradation? (b) What types of problems do the rural and urban poor share? Give some differences in the condi

What is the stage of cellular respiration, What is the stage of cellular re...

What is the stage of cellular respiration during which carbon dioxide is liberated? In aerobic cellular respiration the release of carbon dioxide occurs in the transformation o

Taxonomy, Explain cytological approach in taxonomy.

Explain cytological approach in taxonomy.

Deifition, what''s the define of mitochodria

what''s the define of mitochodria

Explain diabetes mellitus, Diabetes mellitm This anabolic hormone exert...

Diabetes mellitm This anabolic hormone exerts its action on key glycolytic  enzymes  thus  leading  to the conversion of glucose  to  pyruvate as explained under the regulation

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