What is the universal donor blood group?
A) A+
B) B-
C) O-
D) AB+
Which blood group is known as the universal recipient?
A) A+
B) O+
C) AB+
D) B-
Which component of blood is responsible for oxygen transport?
A) White blood cells
B) Platelets
C) Plasma
D) Red blood cells
What determines a person’s blood group?
A) Hemoglobin levels
B) Antigens on red blood cells
C) White blood cell count
D) Platelet size
Which blood group lacks A and B antigens?
A) AB
B) O
C) A
D) B
Which antigen determines the Rh factor?
A) A antigen
B) B antigen
C) D antigen
D) C antigen
Which component helps in blood clotting?
A) Red blood cells
B) White blood cells
C) Platelets
D) Plasma
Which blood vessels carry oxygenated blood away from the heart?
A) Veins
B) Arteries
C) Capillaries
D) Lymphatic vessels
What is the function of veins?
A) Carry oxygen-rich blood
B) Pump blood from the heart
C) Transport blood back to the heart
D) Form blood clots
Which chamber of the heart receives oxygenated blood?
A) Right atrium
B) Left atrium
C) Right ventricle
D) Left ventricle
What is the main function of plasma in blood?
A) Transport nutrients and hormones
B) Fight infections
C) Help in clotting
D) Carry oxygen
Which blood vessels allow the exchange of gases and nutrients?
A) Arteries
B) Veins
C) Capillaries
D) Arterioles
Which part of the heart pumps oxygenated blood to the body?
A) Right atrium
B) Left ventricle
C) Right ventricle
D) Left atrium
Which blood component fights infections?
A) Platelets
B) Red blood cells
C) White blood cells
D) Plasma
What is the lifespan of a red blood cell?
A) 10 days
B) 120 days
C) 30 days
D) 180 days
Which valve prevents backflow of blood into the left atrium?
A) Aortic valve
B) Pulmonary valve
C) Mitral (bicuspid) valve
D) Tricuspid valve
What is the iron-containing protein in red blood cells?
A) Myoglobin
B) Hemoglobin
C) Collagen
D) Keratin
Which blood group has both A and B antigens?
A) O
B) A
C) B
D) AB
Which blood vessel carries deoxygenated blood from the heart to the lungs?
A) Aorta
B) Pulmonary artery
C) Pulmonary vein
D) Superior vena cava
Which blood group is the rarest worldwide?
A) A+
B) O-
C) AB-
D) B+
Which blood group can receive blood from all types?
A) AB+
B) O-
C) A+
D) B-
What is the name of the largest artery in the body?
A) Pulmonary artery
B) Aorta
C) Superior vena cava
D) Coronary artery
Which blood vessel carries oxygenated blood from the lungs to the heart?
A) Pulmonary artery
B) Aorta
C) Pulmonary vein
D) Inferior vena cava
What is the main function of the circulatory system?
A) Produce red blood cells
B) Digest food
C) Transport oxygen and nutrients
D) Control body temperature
Which blood group can donate to all other blood groups?
A) O-
B) AB+
C) A+
D) B+
What is the name of the process by which white blood cells engulf pathogens?
A) Clotting
B) Phagocytosis
C) Diffusion
D) Osmosis
Which organ is responsible for producing red blood cells?
A) Heart
B) Liver
C) Bone marrow
D) Lungs
Which vein carries oxygen-poor blood from the lower body to the heart?
A) Pulmonary vein
B) Coronary vein
C) Inferior vena cava
D) Jugular vein
Which part of the heart pumps blood to the lungs?
A) Right ventricle
B) Left ventricle
C) Right atrium
D) Left atrium
Which condition occurs when there is a low red blood cell count?
A) Hypertension
B) Anemia
C) Leukemia
D) Hemophilia
