Please refer to Chapter 18 Body Fluids and Circulation MCQ Class 11 Biology with answers below. These multiple-choice questions have been prepared based on the latest NCERT book for Class 11 Biology. Students should refer to MCQ Questions for Class 11 Biology with Answers to score more marks in Grade 11 Biology exams. Students should read the chapter Body Fluids and Circulation and then attempt the following objective questions.

MCQ Questions Class 11 Biology Chapter 18 Body Fluids and Circulation

The Body Fluids and Circulation MCQ Class 11 Biology provided below covers all important topics given in this chapter. These MCQs will help you to properly prepare for exams.

Question. The opening between the right atrium and the right ventricle is guarded by a valve called __x__, whereas __y__ guards the opening between the left atrium and the left ventricle :-
(a) x is bicuspid valve, y is tricuspid valve
(b) x is semilunar valve, y is tricuspid valve
(c) x is bicuspid valve, y is semilunar valve
(d) x is tricuspid valve, y is bicuspid

Question. Acute chest pain when no enough oxygen is reaching the heart muscle is called :-
(a) Heart failure
(b) Heart attack
(c) Cardiac arrest
(d) Angina pectoris

Question. Which of the following is considered as pacemaker of human heart?
(a) SA node
(b) AV node
(c) Purkinje fibres
(d) Bundle of His

Question. A unique vascular connection exists between the digestive tract and liver called :-
(a) Renal portal system
(b) Hypophyseal portal system
(c) Gastric portal system
(d) Hepatic portal system

Question. Cardiac output is :- 
(a) Stroke volume x heart beat
(b) Stroke volume – heart beat
(c) Stroke volume + heart beat
(d) Stroke volume ÷ heart beat

Question. Duration of a cardiac cycle:-
(a) 0.8 seconds
(b) 1.2 seconds
(c) 1.8 seconds
(d) 2.0 seconds

Question. Choose the schematic diagram which properly represents pulmonary circulation in humans:-

Question. Role of pacemaker is :-
(a) To initiate and maintain the rhythmic contractile activity of the heart 
(b) To initiate and maintain the arhythmic contractile activity of the heart
(c) To initiate and maintain the rhythmic contractile activity of blood vessels
(d) To generate minimum action potentials for initiating and maintaining the rhythmic contractile activity of the heart

Question. Match the columns and pick out the correct answer :-

(a) (A)-(i), (B)-(ii), (C)-(ii),(D)-(iii)
(b) (A)-(iii), (B)-(ii), (C)-(ii),(D)-(i)
(c) (A)-(iii), (B)-(ii), (C)-(i),(D)-(i)
(d) (A)-(iii), (B)-(i), (C)-(i),(D)-(ii)