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Class 7 Topical Questions and Answers on Blood Circulatory System
The largest component of blood is
A. Plasma
B. Red cells
C. White cells
D. Platelets.
(1m 43s)
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1.
The function of the white blood cells in the human body is to A. Carry carbon dioxide B. Carry oxygen C. Clot blood D. Fight germs
2.
The ventricles of the human heart are thick-walled because they have to A. Receive more blood than auricles B. Contract more often than the auricles C. Store more blood than the auricles D. Produce greater force than the auricles.
3.
When the heart of a mammal contracts, blood in the left ventricle is forced out A. Through the aorta B. Through the pulmonary artery C. Through the pulmonary vein D. Into the left auricle.
4.
The largest component of blood is A. Plasma B. Red cells C. White cells D. Platelets.
5.
Which one of the following statements is TRUE about the human heart? A. Walls of auricles are thicker than those of ventricles. B. Walls of left ventricles are thicker than those of right ventricle. C. Valves prevent the flow of blood. D. Auricles receive oxygenated blood.
6.
Which one of the following statements is NOT TRUE about ALL arteries? A. They carry blood away from the heart. B. They have thick walls. C. Blood pressure in them is high. D. They carry blood rich in oxygen.
7.
The function of haemoglobin in the blood is to A. Fight germs B. Transport food substances C. Cause clotting of blood D. Combine with oxygen.
8.
Which one of the following statements about blood circulation is TRUE? A. Aorta receives oxygenated blood from the auricles. B. Oxygenated blood from the lungs is received by the aorta. C. Pulmonary vein takes oxygenated blood to the lungs. D. Pulmonary artery receives deoxygenated blood from the right ventricles.
9.
The function of plasma is to A. Fight germs B. Combine with oxygen C. Help in clotting of blood D. Transport food
10.
The blood vessel through which deoxygenated blood flows to the heart is the A. Aorta B. Pulmonary artery C. Vena cava D. Pulmonary vein
11.
Which one of the following components of blood is involved in clotting after an injury? A. Plasma. B. White blood cells C. Red blood cells. D. Platelets.
12.
Which one of the following shows the CORRECT order of blood flow in the heart? A. Vena cava-->pulmonary artery-->pulmonary vein--->aorta B. Pulmonary artery-->vena cava-->pulmonary vein--->aorta. C. Pulmonary vein->aorta-->pulmonary artery—>vena cava. D. Aorta-->pulmonary vein-->vena cava-->pulmonary artery.
13.
which one of the following pairs of vessels is Correctly matched with the type of blood they carry? oxygenated blood deoxygenated blood A. Aorta pulmonary artery B. vena cava pulmonary vein C. pulmonary artery vena cava D.Aorta pulmonary vein
14.
Which of the following statements is true about Vena Cava? It carries A. Deoxygenated blood B. Blood from the lungs C. Blood under high pressure D. Blood from the heart.
15.
Which one of the following components of blood is correctly matched with its function? Blood component Function A. Red blood cells clotting of blood B. White blood cells transport oxygen C. Platelets fight germs. D. Plasma transport food.
16.
Which one of the following blood vessels carries blood from the left ventricle? A. Vena cava B. Pulmonary artery C. Aorta D. Pulmonary vein.
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