Hibernation and aestivation, Biology

Assignment Help:

Hibernation and Aestivation

Poikilotherms pass the winter in a resting state, known as hibernation. When they enter a resting state in response to heat or drought, the condition is called aestivation. In general Poikilotherms derive two types of benefit from the resting states that may enter during times of environmental stress.

First, by virtue of their special physiological state, the animals may enjoy an enhanced physiological ability to cope with the extreme conditions. (Example increased freezing resistance etc.) Second, they are often permitted to remain continuously in favourable microhabitats. Their metabolism is depressed to such an extent that the store of nutrients (example, body fat) can augment. The variety of mechanisms exploited by Poikilotherms in escaping some of the rigors of extreme temperatures may be divided into behavioural and physiological adaptations.

 


Related Discussions:- Hibernation and aestivation

Define important points while working with autoclave, Define Important Poin...

Define Important Points While Working With Autoclave? Note: Following points should be kept in mind while working with autoclave. 1. Autoclave should not be packed tightly o

Human impact on the phosphorus cycle, Human Impact on the Phosphorus Cycle ...

Human Impact on the Phosphorus Cycle Like other biogeochemical cycles, human activities have altered the phosphorus cycle. Human beings mine phosphate rocks and guano deposits

Inadequate dietary intake - cause of anaemia is dietary, Define Inadequate ...

Define Inadequate Dietary Intake - cause of anaemia is dietary? The commonest cause of anaemia is dietary inadequacy of iron. The dietary intakes arc usually half of the recomm

What are the fundamental constituents of the cell membrane, Q. What are the...

Q. What are the fundamental constituents of the cell membrane? The cell membrane is formed of lipids, carbohydrates and proteins. The membrane lipids are phospholipids, a sp

Is it necessary for blood to have less or more hemoglobin, Q. In high altit...

Q. In high altitudes is it necessary for the blood to have less or more hemoglobin? In high altitudes the oxygen concentration and air is rarefied is lower than in low altitude

Which hormones secreted by the adenohypophysis, Q. What are the hormones se...

Q. What are the hormones secreted by the adenohypophysis? What are their respective functions? The ACTH (adrenocorticotropic hormone), adenohypophisys secretes GH (growth hormo

BLOOD CELLS, What is the function of platelets?

What is the function of platelets?

Is memory loss an early sign of alzheimer''s disease, Is memory loss an ear...

Is memory loss an early sign of Alzheimer's disease? A. Memory loss is one of the earliest symptoms of Alzheimer's disease and other kinds of dementia however occasional forget

What are diastolic compressive forces, Q. What are Diastolic Compressive Fo...

Q. What are Diastolic Compressive Forces? Coronary perfusion pressure equal to pressure gradient between the coronary arteries and the pressure in LV in diastole. When coronary

Palaeobiology, Palaeobiology : This deals with the study of fossils and rem...

Palaeobiology : This deals with the study of fossils and remains an impressions of the past organisms found in the rock of different ages. Paleobiology is a growing or comparativel

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