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A pure phospholipid bilayer with its hydrophobic interior, is permeable to water and gases such as O2, CO2, N2 and small uncharged polar molecules such as urea, ethanol, but is impermeable to large uncharged polar molecules such as glucose, ions (Na+ , K+ , Cl-, Ca2+ ) and charged polar molecules instance for amino acids, ATP, glucose 6-phosphate. The initial group of molecules can cross a biological membrane unaided and without an input of energy, whereas the latter group requires the presence of integral membrane transport proteins and, in many cases an input of energy to travel by the otherwise impermeable membrane barrier. Thus the plasma membrane and the membranes of internal organelles are selectively permeable barriers and maintaining a distinct internal environment.
Explain Protein Deficiencies in Nutritional Care? A depleted amino acid pool leads to poor wound healing (dehiscence), delayed healing of fractures, anaemia, depressed pulmonar
Define Procedure for Measurement of pH? To ensure reliability of the pH readings, you should first calibrate the pH meter. You should adjust the pH meter so that the readings a
V AGIN A - Median, elastic, muscular tube 7.5 cm long. Open into vestibule by vaginal orffice. The lining forms vaginal rugae. Space between vaginal wall & cervix is forn
Describe about diagnostic approach for congenital heart disease ? In this section we propose to outline the principles of a diagnostic approach that is applicable to newborns,
Explain about the Iron - Micro Minerals? Iron was a familiar metal even in the ancient civilization. In India, iron implements made their appearance in between 1300-1000 BC and
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Sublimation is the process by which solid water changes directly to vapour phase without passing through the intervening liquid phase. The gradual disappearance of flakes of ice
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DNA Replication Deoxyribonucleic acid (DNA) is the carrier of genetic data for all living creatures. An organism's genome, made of DNA, encodes the genetic blueprint for buildi
Q. What do you undersand by pollution? The Pollution is the contamination of an ecosystem by factors that are harmful for the equilibrium of its abiotic or biotic constituents.
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