#1
Which blood component is primarily responsible for oxygen transport?
Red blood cells
ExplanationCarries oxygen via hemoglobin.
#2
Which blood type is considered the universal donor?
O
ExplanationLacks A and B antigens, compatible with all blood types.
#3
Which of the following is NOT a function of blood?
Production of urine
ExplanationBlood is not involved in urine production.
#4
Which blood component is primarily responsible for immune defense?
White blood cells
ExplanationKey players in the body's immune system.
#5
Which organ is primarily responsible for the production of most blood cells?
Bone marrow
ExplanationSite of blood cell synthesis.
#6
What is the process by which blood cells are formed called?
Hematopoiesis
ExplanationFormation of blood cells in bone marrow.
#7
Which component of blood is responsible for clotting?
Platelets
ExplanationEssential for blood clot formation.
#8
What is the lifespan of a red blood cell?
120 days
ExplanationTypically circulates for around 120 days.
#9
Which blood type lacks both A and B antigens?
O
ExplanationHas neither A nor B antigens on red blood cells.
#10
What is the process of blood vessel constriction and platelet aggregation to stop bleeding called?
Hemostasis
ExplanationStopping bleeding, maintaining vascular integrity.
#11
What is the name of the hormone responsible for stimulating red blood cell production?
Erythropoietin
ExplanationStimulates bone marrow to produce RBCs.
#12
Which of the following is NOT a type of white blood cell?
Thrombocyte
ExplanationThrombocytes are platelets, not WBCs.
#13
What is the primary function of platelets in the blood?
Clotting
ExplanationForm clots to prevent excessive bleeding.
#14
Which of the following blood cells are the largest and play a key role in the immune response?
Monocytes
ExplanationLarge WBCs, involved in phagocytosis.
#15
Which hormone is responsible for regulating the production of red blood cells?
Erythropoietin
ExplanationStimulates RBC production in bone marrow.