Histology of Blood Cells Quiz

Which of the following represents the average diameter of a red blood cell?

• 5 micrometers

• 7.5 micrometers

• 10 micrometers

• 12 micrometers

Which of the following is the normal red blood cell count in a healthy adult male?

• 3.5 - 4 million/mm³

• 4 - 4.5 million/mm³

• 5 - 5.5 million/mm³

• 6 - 6.5 million/mm³

Which of the following is a condition where RBCs become crescent-shaped, particularly under low oxygen conditions?

• Crenation

• Spherocytes

• Swollen RBCs

• Sickle cells

Which of the following terms refers to a red blood cell that is smaller than 6 micrometers in diameter?

• Macrocyte

• Microcyte

• Poikilocyte

• Spherocyte

Which of the following leukocytes is primarily responsible for the first line of cellular defense against infections?

• Eosinophils

• Neutrophils

• Lymphocytes

• Basophils

A 10-year-old boy presents with fever, sore throat, and pus on the tonsils for 2 days. CBC shows a marked rise in which type of white blood cell typical of acute bacterial infection? Which of the following blood cells is most likely to increase in this case?

• Eosinophils

• Lymphocytes

• Neutrophils

• Monocytes

A 12-year-old child with abdominal pain is diagnosed with intestinal helminths. Which leukocyte is most likely to be elevated in this parasitic infestation?

• Neutrophils

• Eosinophils

• Monocytes

• Lymphocytes

A 45-year-old man complains of chronic cough with sputum for 3 months. Blood tests show predominance of which leukocyte typical of chronic bacterial infection?

• Eosinophils

• Lymphocytes

• Neutrophils

• Monocytes

A 25-year-old woman comes for a routine checkup. Her complete blood count shows a platelet count of 280,000/mm³. The physician explains that this value lies within the normal range.

Which of the following best describes the normal range of blood platelets per cubic millimeter (mm³)?

• 50,000-100,000

• 100,000-200,000

• 150,000-450,000

• 200,000-500,000

Which of the following processes are blood platelets primarily involved in?

• Oxygen transport

• Immune response

• Thrombus formation

• Nutrient distribution