#1
Which component of blood is responsible for carrying oxygen throughout the body?
Red blood cells
ExplanationRed blood cells carry oxygen via hemoglobin.
#2
What is the average lifespan of a red blood cell in the human body?
120 days
ExplanationRed blood cells live for approximately 120 days.
#3
Which of the following is NOT a symptom of anemia?
Excessive bleeding
ExplanationExcessive bleeding is not a symptom of anemia but can result from it.
#4
Which blood type is known as the 'universal donor'?
O
ExplanationBlood type O can be donated to recipients of other blood types.
#5
Which organ is primarily responsible for the production of blood cells in the human body?
Bone marrow
ExplanationBone marrow produces blood cells, including red and white blood cells.
#6
Which of the following is NOT a type of white blood cell?
Thrombocytes
ExplanationThrombocytes are platelets, not white blood cells.
#7
What is the primary function of platelets in the blood?
Help with blood clotting
ExplanationPlatelets aid in blood clotting to prevent bleeding.
#8
What is the term for the process by which white blood cells engulf and destroy foreign particles?
Phagocytosis
ExplanationPhagocytosis is the process of white blood cells ingesting foreign particles.
#9
Which hormone stimulates the production of red blood cells in the bone marrow?
Erythropoietin
ExplanationErythropoietin regulates red blood cell production in the bone marrow.
#10
What is the term for a low platelet count in the blood?
Thrombocytopenia
ExplanationThrombocytopenia is characterized by a deficiency of platelets in the blood.
#11
Which condition is characterized by an abnormal increase in red blood cells?
Polycythemia
ExplanationPolycythemia involves an excessive production of red blood cells.
#12
Which of the following is a genetic disorder that affects the ability of blood to clot?
Hemophilia
ExplanationHemophilia impairs blood clotting due to a deficiency in clotting factors.
#13
What is the medical term for a blood clot that forms within a blood vessel and obstructs blood flow?
Thrombus
ExplanationA thrombus is a blood clot that forms in a blood vessel.
#14
Which of the following blood cells are primarily involved in the immune response?
Lymphocytes
ExplanationLymphocytes play a key role in the body's immune response.