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What is the effect of pCO2 on oxygen transport?
This is called the Bohr effect where a increase in pC02 which decrease the pH leads to a decreased affinity of hemoglobin to oxygen. This means that hemoglobin unloads oxygen in areas where pC02 is high e.g. active tissue and that the binding coefficient of hemoglobin is highest in the lung where pC02 is negligible.
What are the factors that affect hemoglobin's affinity for oxygen?
The primary factor that determines how much oxygen is actually bound to hemoglobin is the partial pressure of oxygen (pO2) in the hemoglobin solution.
What is O2-Hb dissociation curve?
The oxygen-haemoglobin dissociation curve, also spelled oxygen-hemoglobin dissociation curve, plots the proportion of hemoglobin in its saturated form on the vertical axis against the prevailing oxygen tension on the horizontal axis. The oxyhemoglobin dissociation curve is an important tool for understanding how our blood carries and releases oxygen. Specifically, the oxyhemoglobin dissociation curve relates oxygen saturation (SO2) and partial pressure of oxygen in the blood (PO2), and is determined by what is called "hemoglobin's affinity for oxygen"; that is, how readily hemoglobin acquires and releases oxygen molecules into the fluid that surrounds it. found on wikipedia
The highest oxygen affinity is demonstrated by?
The highest oxygen affinity is demonstrated by fetal hemoglobin (HbF), due to its higher affinity for oxygen compared to adult hemoglobin (HbA). This allows for efficient oxygen transfer from the mother to the fetus in the placenta.
What effects oxygen binding to and dissociation from hemoglobin?
Ph and temperature
How many time greater is the affinity of hemoglobin for carbon monoxide greater than the affinity of hemoglobin for oxygen?
The affinity of hemoglobin for CO is roughly 20,000 times greater than that of oxygen in vitro. In vivo, the affinity of hemoglobin for CO is roughly 200-225 greater than that of oxygen. ------------------------------------------------------------------------------------------------- O2 has stronger bond than CO. Therefore, the oxygen in CO loves the iron in the hemoglobin as iron ends with two electrons which complete the 6 electrons in the oxygen. In vivo, the affinity of hemglobin for CO is about 153 from 141x153/141. by amin elsersawi
Why does the rise in temperature decrease the affinity of hemoglobin for oxygen?
The rise of temperature denatures the bond between oxygen and hemoglobin.
Why does an increase in temperature cause the oxygen dissociation curve to shift to the right?
when we excercising, tissue generates heat.those heat would increase the temperature of the neighboring cell, that exercise and need more energy. thus, more oxygen is needed, making the graph shift to the right because hemoglobin release oxygen faster to accord the increasing demand during exercise.
Does a low pH decrease hemoglobins affinity for oxygen?
Yes, a low pH (acidic environment) decreases hemoglobin's affinity for oxygen. This is known as the Bohr effect, where pH and carbon dioxide levels affect oxygen-hemoglobin binding. In an acidic environment, hemoglobin releases oxygen more readily to tissues where it is needed.
Why does llama hemoglobin have a higher affinity for oxygen?
Llama hemoglobin has a higher affinity for oxygen because it has a unique structure that allows it to bind more tightly to oxygen molecules, enabling llamas to efficiently extract oxygen from the thin air at high altitudes where they live.
Why does carbon monoxide bind to hemoglobin?
Carbon monoxide binds to hemoglobin because it has a higher affinity for hemoglobin than oxygen does. This means that carbon monoxide can displace oxygen from hemoglobin, leading to a decrease in the amount of oxygen that can be transported in the blood.
What will decrease the affinity of hemoglobin for oxygen?
Factors that can decrease the affinity of hemoglobin for oxygen include an increase in temperature, a decrease in pH (acidity), an increase in levels of carbon dioxide, and the presence of certain substances like 2,3-DPG.
