Blood Composition Quiz

The percent of cells in a sample of human blood is normally about

• 15%

• 30%

• 45%

• 60%

Which type of blood cells are biconcave and lack a nucleus when mature?

• Red blood cells

• White blood cells

• Platelets

• Macrophages

What is the term for the proportion of blood volume that is occupied by red blood cells?

• WBC count

• hematocrit

• RBC count

• erythropoiesis

What is the main role of red blood cells in the human body?

• To initiate the process of blood clotting

• To transport oxygen by binding it with hemoglobin

• To identify and eliminate foreign substances

• To support the structure of blood vessels

Which component of blood helps in the clotting process?

• Plasma

• White blood cells

• Platelets

• Red blood cells

What role does plasma play in the circulatory system?

• It carries oxygen to the cells

• It is a yellowish fluid that transports cells and nutrients

• It identifies and neutralizes foreign substances

• It helps in the formation of blood clots

Which type of leukocyte is responsible for releasing histamines during allergic reactions?

• Monocytes

• Basophils

• Eosinophils

• Neutrophils

What is the primary role of neutrophils?

• Fights chronic infections and produces antibodies

• Majority of WBC and first to arrive at site of infection

• Fights parasitic infections

• Releases histamines and heparin

Which component of blood is responsible for carrying oxygen?

• Leukocytes

• Thrombocytes

• Erythrocytes

• Lymphocytes

Which type of blood cell is responsible for fighting infections?

• Erythrocytes

• Leukocytes

• Thrombocytes

• Monocytes