Red Blood Cells and Their Functions

What is the average diameter of a red blood cell?

• 5.5 micrometers

• 7.5 micrometers

• 10 micrometers

• 12 micrometers

What is the average red blood cell count for women?

• 3,500,000 per cubic millimeter

• 6,000,000 per cubic millimeter

• 5,200,000 per cubic millimeter

• 4,700,000 per cubic millimeter

What gives red blood cells their red color?

• Water

• Hemoglobin

• Enzymes

• Electrolytes

What is the term for hemoglobin when it is bound with oxygen?

• Oxyhemoglobin

• Deoxyhemoglobin

• Carboxyhemoglobin

• Methemoglobin

Why do red blood cells lack a nucleus?

• To allow more space for hemoglobin

• To increase their lifespan

• To make them more flexible

• To reduce their size

What is the shape of a red blood cell?

• Spherical

• Biconcave

• Cylindrical

• Flat

What is the initial stage of red blood cell synthesis?

• Proerythroblast stage

• Hemocytoblast stage

• Reticulocyte stage

• Erythrocyte stage

Which component is essential for the creation of hemoglobin?

• Calcium

• Iron

• Magnesium

• Potassium

How long do red blood cells typically last?

• 150 days

• 120 days

• 90 days

• 60 days

Where are red blood cells destroyed after their lifespan ends?

• Stomach and intestines

• Kidneys and bladder

• Heart and lungs

• Spleen and liver