Haemoglobin is an amazing molecule, as it allows vertebrates to transport gases
ID: 3520828 • Letter: H
Question
Haemoglobin is an amazing molecule, as it allows vertebrates to transport gases from the environment to the tissues. To boot, blood changes its oxygen-binding characteristics in response to the animal’s external AND internal environment. How does this happen? What are the advantages of this “shape-shifting” ability? How does O2 affinity of Hb compare between mammals adapted to hypoxia and those in normoxia? How does it compare between sedentary and athletic species? Explain why. Some Antarctic fish lack haemoglobin completely. Their blood is composed of plasma and a few white blood cells. How are these fishes able to survive and succeed in their environment? Explain.
Explanation / Answer
How does oxygen binding chrachterstic are changed in response to external and internal environment ?
T his a very basic question
The body when hypo perfused due to any reason the tissue hypoxia occurs which releases certain chemical to inc oxygenation OR blood supply
Initially the fastest method I.e blood supply is altered slowly oxygenation in chronic conditions
This comes to 2nd answer
The oxygen carrying capacity have to be increased in animals adapted to hypoxia
Also using the same concept athletes would have YB with more affinity towards O2
The respiratory function of Hb is a product of the proteins intrinsic O2-binding affinity and its interactions with allosteric affectors such as protons,chloride ions,CO2, and organic phosphates
Given that the oxygen-binding affinity of hemoglobin is largely determined by variation in the primary structure of the individual subunit polypeptides, this presumably adaptive altitudinal variation in blood oxygen affinity may be associated with allelic variation in the ?- or ?-globin genes.
The fish in question is known as White crocodile fish
Named due to its appearence.
The reasons for its such evolution is explained using two different theories
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