CBSE Class 11 Biology Body Fluids and Circulation Worksheet Set A

Question. Which of the following blood group can be given to any patient ? 
(a) A
(b) B
(c) O
(d) AB
Answer. C

Question. Thickening of arteries due to cholesterol deposition is 
(a) arteriosclerosis
(b) rheumatic heart
(c) blood pressure
(d) cardiac arrest.
Answer. A

Question. Which one of the following is a matching pair?
(a) Lubb - Sharp closure of AV valves at the beginning of ventricular systole.
(b) Dup - Sudden opening of semilunar valves at the beginning of ventricular diastole.
(c) Pulsation of the radial artery valves in the blood vessels.
(d) Purkinje fibres-Initiation of the heart beat.
Answer. A

Question. Which of the following organs is the blood bank? 
(a) Heart
(b) Lungs
(c) Spleen
(d) Liver
Answer. C

Question. Which one of the following is a matching pair of a certain body feature and its value/count in a normal human adult?
(a) Urea 5-10 mg / 100 ml of blood
(b) Blood sugar (fasting) - 70-100 mg/100 ml
(c) Total blood volume - 5-6
(d) ESR in Wintrobe method - 9-15 mm in males and 20-34 mm in females
Answer. B

Question. Which of the following chamber of heart has the thickest muscular wall ? 
(a) Left auricle
(b) Left ventricle
(c) Right ventricle
(d) Right auricle
Answer. B

Question. Bulk of carbon dioxide (CO₂) released from body tissues into the blood is present as 
(a) 70% carbamino-haemoglobin and 30% as bicarbonate
(b) carbamino-haemoglobin in RBCs
(c) bicarbonate in blood plasma and RBCs
(d) free CO₂ in blood plasma
Answer. C

Question. Given below is the ECG of a normal human.Which one of its components is correctly interpreted below?

(a) Peak P and Peak R together - systolic and diastolic blood pressures
(b) Peak P - Initiation of left atrial contraction only
(c) Complex QRS - One complete pulse
(d) Peak T - Initiation of total cardiac contraction
Answer. C

Question. The figure below shows an angioplasty of the coronary blood vessel. Which one of the following statements correctly describes, what is being done?

(a) It is coronary artery which has a cancerous growth that is being removed.
(b) It is coronary artery which is blocked by a plaque and the same is being cracked.
(c) It is coronary vein in which the defective valves are being opened.
(d) It is coronary vein blocked by a parasite (blood fluke) that is being removed.
Answer. B

ASSERTION REASON QUESTIONS

Directions : Each of these questions contains an Assertion followed by Reason. Read them carefully and answer the question on the basis of following options. You have to select the one that best describes the two statements.
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
(c) If Assertion is correct but Reason is incorrect.
(d) If both the Assertion and Reason are incorrect.

Question. Assertion : Prothrombinase enzyme act as antiheparin. 
Reason : Heparin prevent coagulation of blood in blood vessels.
Answer. B

Question. Assertion : Blood is coloured in the insects.
Reason : Insect blood has no role in O₂ transport.
Answer. B

Question. Assertion : When there is a fall in the blood pressure due to loss of blood volume, this is compensated by vasoconstriction of veins.
Reason : Veins hold the extra amount of blood which can be shifted to the arteries as required.
Answer. A

Question. Assertion : Lub is a heart sound which is produced during each cardiac cycle.
Reason : It is associated with the closure of the tricusp and bicuspid valves.
Answer. B