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Oxygen Transport in Blood
All four respiratory pigments are adapted to load and unload oxygen effectively in I the habitats where they have evolved, whether animals live on land where the air contains 210 ml of oxygen per litre or in fresh water containing 8.0 ml / litre or in the sea containing 6.4 ml / litre. The loading unloading reaction can be written as
The direction of this reaction depends on Po2 of the environment and bond strength or affinity between haemoglobin and oxygen. In the lungs where Po, is high almost all deoxyhaemoglobin molecules bind to oxygen. Low Po2 in the systemic capillaries promotes unloading. Similarly strong affinity favours loading and weak bonding favours unloading. Haemoglobin has a bond strength which permits 97% of haemoglobin to combine with oxygen when leaving the lung. At the same time the bond is sufficiently weak to permit unloading in tissues. Under normal resting conditions 22% of the oxygen is unloaded. This satisfies the oxygen need of the body simultaneously maintaining a reserve that is utilised during emergency conditions.
What is the difference between the lateral and the apical buds of the plants? Lateral buds are portions of meristematic tissue situated in the base of the shoots. Apical bud
for assignment
In that Unit you also learnt about Darwin, who based on his extensive observations and interpretations showed that evolution is a simple fact of nature. It was Theodosius Dobzhansk
The difference b/n algae,bryophyte&pteridophyte?
Q. Explain about Non Insulin Dependent Diabetes Mellitus? Overweight and obese adults are generally afflicted by this type of diabetes. The insulin produced by the pancreas is
organism that have wide tolerance range
The principal nitrogenous excretory compound in humans is synthesised: 1. in kidneys but eliminated mostly through liver 2. in kidneys as well as eliminated by kidneys 3.
Q. How is reproduction done in beings of the class Reptilia? These beings reproduce sexually through internal fecundation by means of copulation between female and male individ
Tracheae - Respiratory Organs Tracheal respiration is characteristic of insects. Onychophorans, diplopods, arachnids, and chilopods as well use tracheal system for respiration
What has caused evolution? 1) Different individuals have dissimilar characteristics 2) These differences result in altering abilities to reproduce under local circumstances
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