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Water loss during excretion
In terrestrial animals body water is also lost during excretion of nitrogenous wastes. A number of physiological adaptations have taken place to minimise the loss of water associated with this phenomena. You have learnt in the previous Unit that among terrestrial invertebrates, insects are highly effective in conserving water.
In terrestrial vertebrates, kidney is the chief organ of osmoregulation and excretion. The loop of Henle is the specialised part of the nephron which produces hyperosmotic urine. Amphibians and reptiles which are unable to produce a hyperosmotic urine, as an adaptive consequence, cease urine production entirely during the period of osmotic stress.
phylum platyhelminthes
What are the main divisions and representing species of the gymnosperms? This group of plants can be divided into conifers (pine, sequoia, cypress), that have flowers known as
The vascular tone increases as the arterial size decreases. The tone at any time reflects the effects of excitory and inhibitory pathways. Neurotransmitters, physical forces like s
Q. What is hypercholeslerolaemia? Cholesterol: It is a natural component of foods such as mutton, pork, ham, sausages, lamb, chicken, eggs (yellow), whole milk, cheese, ice-cre
distinguishing charecters and classification of protozoa upto phyla
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SKIN - Largest organ of body. It is covered by hairs or pelage i.e. pillifera. Study of skin is dermatology. Outermost covering of body. Skin is elastic and
Q. Etiological factor of dyspepsia? The main etiological factor of dyspepsia is the failure of proper digestion and absorption of food in the alimentary tract and the consequen
what can we do after reading biology???
Anabolic reactions: The intermediates of citric acid cycle are used as precursors in tlie biosynthesis of many compounds like synthesis of glucose from carbon skeletons of am
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