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Questions and Answers
What is the primary function of red blood cells?
What is the primary function of red blood cells?
- To fight infections in the body
- To carry oxygen to the tissues and return carbon dioxide to the lungs (correct)
- To produce antibodies in response to pathogens
- To regulate blood pressure in the body
What is the molecular structure of normal adult haemoglobin A?
What is the molecular structure of normal adult haemoglobin A?
- β2γ2
- α2δ2
- α2γ2
- α2β2 (correct)
What is the name of the haemoglobin present in small quantities in normal adult blood, that contains δ chains?
What is the name of the haemoglobin present in small quantities in normal adult blood, that contains δ chains?
- Hb A2 (correct)
- Hb F
- Hb C
- Hb A
At what age does the dominant haemoglobin in blood change from one type to another?
At what age does the dominant haemoglobin in blood change from one type to another?
What is the site of gaseous exchange in the body where red cells carry out their function?
What is the site of gaseous exchange in the body where red cells carry out their function?
What is the primary function of the haem group in haemoglobin?
What is the primary function of the haem group in haemoglobin?
What is the significance of the presence of Hb F and Hb A2 in normal adult blood?
What is the significance of the presence of Hb F and Hb A2 in normal adult blood?
What is the difference between the α chains in Hb A and Hb F?
What is the difference between the α chains in Hb A and Hb F?
Why is haemoglobin A the dominant haemoglobin in blood after the age of 3-6 months?
Why is haemoglobin A the dominant haemoglobin in blood after the age of 3-6 months?
What is the role of the polypeptide chains in haemoglobin?
What is the role of the polypeptide chains in haemoglobin?
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Study Notes
Red Blood Cell Function
- Red blood cells carry oxygen (O2) to tissues and return carbon dioxide (CO2) from tissues to lungs.
Haemoglobin Structure
- Haemoglobin is a specialized protein in red blood cells that enables gaseous exchange.
- One molecule of normal adult haemoglobin A (Hb A) consists of four polypeptide chains: α2β2.
- Each chain has a haem group.
Haemoglobin Variations
- Normal adult blood contains small quantities of two other haemoglobins: Hb F and Hb A2.
- Hb F and Hb A2 contain α chains, but with γ and δ chains, respectively, instead of β chains.
Red Blood Cell Function
- Red blood cells carry oxygen (O2) to tissues and return carbon dioxide (CO2) from tissues to lungs.
Haemoglobin Structure
- Haemoglobin is a specialized protein in red blood cells that enables gaseous exchange.
- One molecule of normal adult haemoglobin A (Hb A) consists of four polypeptide chains: α2β2.
- Each chain has a haem group.
Haemoglobin Variations
- Normal adult blood contains small quantities of two other haemoglobins: Hb F and Hb A2.
- Hb F and Hb A2 contain α chains, but with γ and δ chains, respectively, instead of β chains.
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