Circulatory System Pre-Assessment

What is the primary function of platelets in the circulatory system?

• Transport oxygen

• Aid in blood clotting

• Fight infections

• Regulate blood pressure

Which term is used to describe the process by which platelets help stop bleeding?

• Hemolysis

• Hemostasis

• Phagocytosis

• Osmosis

Platelets are also known as:

• Leukocytes

• Thrombocytes

• Erythrocytes

• Lymphocytes

Where are platelets produced in the human body?

• Liver

• Bone marrow

• Spleen

• Heart

Which of the following is NOT a component of blood?

• Plasma

• Platelets

• Neurons

• Red blood cells

What is the average lifespan of a platelet in the bloodstream?

• 1-2 days

• 7-10 days

• 30-40 days

• 120 days

Which vitamin is essential for proper platelet function in clotting?

• Vitamin A

• Vitamin K

• Vitamin C

• Vitamin D

What is the normal range of platelet count in a healthy adult per microliter of blood?

• 1,000–10,000

• 150,000–450,000

• 500,000–1,000,000

• 10,000–50,000

Which of the following diseases is associated with a low platelet count?

• Thrombocytopenia

• Leukemia

• Anemia

• Hemophilia

Platelets are fragments of which type of cell?

• Megakaryocyte

• Monocyte

• Lymphocyte

• Erythroblast