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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.
DERMIS (CORIUM) - Mesodermal in origin. More developed part. Leather is obtained from dermis by tanning. Thinnest in eye lid. Connective tissue present. In it 4 types
M i croinjection method: In another approach fertilised eggs are microinjected by DNA. Microinjection requires excess of fertilized eggs. Gene transfer by microinjection is
Q. Nutritional management of diabetes mellitus? we will learn about the nutritional management of diabetes mellitus which is an important metabolic disorder of public health si
Pneumonia: Pneumonia is an inflammation with consolidation of the parenchyma of the lung. It occurs most commonly in infants and young children and may occur as primary dis
Mycotoxicoses Mycotoxicoses cause heavy economic loss due to high morbidity and consequent production loss. Low grade mortality is also recorded. The main toxins involved are
Explain congenital heart disease ? No systematic surveys have been conducted to estimate the incidence of CHD at birth in India and other developing countries. As a result ther
life cycle of ascomycota
Define Fraction in which Calcium in plasma is Present? Calcium in plasma is present in three major fractions: Ionized calcium Protein bound calcium Complexed c
Q. Explain Pathology of aortic stenosis? Congenital abnormalities of aortic valve may lead to unicuspid aortic valve. This may be dome shaped with central stenotic orifice. Uni
Since erythrocytes red blood cells do not hold any sub cellular organelles they are essentially a membranous sac for carrying haemoglobin their plasma membrane is a convenien
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