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In a unicellular organism, the interior region of the organism is no longer in contact with the external environment. Thus simple processes of diffusion, phagocytosis, exocytosis and contact with sea water helped in exchanging the necessary molecules and nutrients. But a further increase in size and complexity of the organism lead to concentration of the pool of cytoplasm. The fluid in-between the cells was known as interstitialfluids.
These fluids, due to constant exchange of molecules between the various cells lead to changes in the internal environment which influenced the functioning of the cell. Physiology, we learnt earlier, is concerned with such basic activities as reproduction, growth, metabolism, excitation and contraction as they are carried out within the fine structure - the cells, tissues, organs and organ systems of the body. The various body systems of our body are enumerated next.
Importance of Parent materials Different rocks or parent materials placed under similar climatic conditions give rise to soils which are very similar to one another. On the o
Define the sensory speech area of the Cerebrum The sensory speech area is situated in the lower part of the parietal lobe and extends into temporal lobe as indicated in the Fig
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Oxidoreductases To this group (EC 1) beIongs all enzymes catalyzing oxidation-reduction reactions. Common names include dehydrogenases, oxidazes, reductases and catalases.
Venus-the Clouded Planet Venus, our nearest planetary neighbour, only 40 million km away, has its surface hidden from view by a dense yellowish-white cloud, which extends to 80
Iron Age: We briefly surveyed the ideas and techniques of the early human beings, and traced the roots of science in the primitive culture. You also read about the emergence
Big bang theory is failed ...Why???
Explain the Secretion of Aldosterone A minimal amount of ACTH is also needed for the secretion of aldosterone. The secretion of aldosterone is thus stimulated by: a d
The digestive system is made up of two groups of organs: Alimentary tract, which includes mouth, pharynx, oesophagys, stomach, small intestine, large intestine, appendix
How can we know the parent material of soils?
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