Understanding Red Blood Cells

What are red blood cells also known as?

• Erythrocytes

• Lymphocytes

• Leukocytes

• Thrombocytes

Why is the biconcave shape of red blood cells beneficial?

• It helps them move faster in the bloodstream.

• It makes them more resistant to infections.

• It increases their surface area for gas exchange.

• It allows them to store more nutrients.

Which protein in the red blood cell membrane contributes to its flexibility?

• Actin

• Myosin

• Spectrin

• Keratin

What is missing in red blood cells that is typically found in other cells?

• Cytoplasm

• Nucleus

• Ribosomes

• Cell membrane

What is the primary function of hemoglobin in red blood cells?

• To produce proteins

• To transport oxygen

• To fight infections

• To store energy

How many oxygen molecules can one hemoglobin molecule carry?

• One

• Two

• Three

• Four

What happens to hemoglobin when red blood cells reach tissues in need of oxygen?

• It stores oxygen for later use.

• It converts oxygen to carbon dioxide.

• It releases oxygen.

• It binds more tightly to oxygen.

What percentage of carbon dioxide is carried in the blood as bicarbonate?

• 70%

• 23%

• 100%

• 7%

What is the role of carbonic anhydrase in red blood cells?

• It breaks down glucose.

• It synthesizes hemoglobin.

• It helps in oxygen transport.

• It converts carbon dioxide to bicarbonate.

What is formed when carbon dioxide binds to hemoglobin?

• Carboxyhemoglobin

• Carbaminohemoglobin

• Oxyhemoglobin

• Methemoglobin