Quiz on Red Cell Membrane Structure and Function

What is the primary function of the red cell?

• Transport of nutrients

• Transport of respiratory gases

• Production of hormones

• Regulation of blood pressure

What percentage of the red cell membrane is composed of proteins?

• 60%

• 40%

• 30%

• 50%

Which of the following is a component of the red cell membrane?

• Mitochondria

• Ribosomes

• Nucleic acids

• Proteins

What type of proteins are primarily involved in forming the cytoskeleton of the red cell?

• Integral proteins

• Peripheral proteins

• Enzymatic proteins

• Transport proteins

Which phospholipid is mainly present in the extracellular layer of the red cell membrane?

• Phosphatidyl choline

• Phosphatidyl serine

• Sphingomyelin

• Phosphatidyl ethanolamine

What is the role of Band 3 protein in the red cell membrane?

• Stabilizes the cytoskeleton

• Facilitates glucose transport

• Facilitates anion transport

• Acts as a receptor for transferrin

What is the main function of the Na+/K+ ATPase in red blood cells?

• Regulation of blood pH

• Transport of glucose

• Maintaining ion gradients

• Facilitating gas exchange

Which of the following is a characteristic of membrane carbohydrates in red blood cells?

• Occur as glycoproteins and glycolipids

• Act as receptors for hormones

• Found only on the internal surface

• Make up the majority of membrane composition

What happens to red blood cells with increased membrane cholesterol?

• Increased surface area and decreased deformability

• No effect on membrane properties

• Increased deformability

• Decreased surface area

What is hereditary spherocytosis associated with?

• Abnormal membrane cholesterol distribution

• Defective cytoskeletal proteins

• Increased flexibility of red cells

• Increased surface area to volume ratio