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Hibernation and Aestivation
Hibernation, aestivation and daily torpor are states in which the animal relaxes its homeothermic processes almost completely within a certain range of ambient temperatures and, like a Poikilotherms, allows its body temperature to equal ambient temperature. When body temperature is fixed to approximate ambient temperature for periods of several days or longer during winter, the phenomenon is termed hibernation. When this occurs during summer, it is called aestivation.
The digitalis glycosides are the only orally active positive inotropic agents currently available. The positive inotropic occurs through inhibition of the enzyme Na + -K + -ATPase
explain pcr
Why do vestigial structures persist in modern organisms? Explain the evidence that indicates that species evolve over time. The environment will not select for or against
Q. Which chemical element is the central in the chlorophyll molecule? The chemical element that is the central in the chlorophyll molecule is magnesium. One atom of magnesium
What are the major morphological differences between monocot plants and dicot plants? The main differentiation criteria among monocots and dicots are: number of cotyledons (see
Insects - Hormones in Growth and Reproduction In insects hormones regulate moulting and metamorphosis. The larvae or nymphs which hatch out of the eggs undergo regular moultin
Yellow fever Yellow fever also known as Black Vomit and American plaque is a viral disease primarily of monkeys and transmitted to man by female Aedes mosquitoes. It is caused
What are the cells that produce the myelin sheath? Of which substance is the myelin sheath formed? In the central nervous system (CNS) the myelin sheath is made by apposition o
Q. What is factor VIII? What is the genetic disease in which this factor is absent? Factor VIII has the function of activating factor X that in its turn is necessary for the tr
name the sturcture formed when the male and female nuclei fuse during fertilisation.
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