MCQ on Double Circulation: Biology is one of the most important and vital sections in NEET. It includes theories, descriptions, discoveries, diagrams, definitions, explanation of differences and relations. Most of the concepts covered in the NEET syllabus are from the NCERT syllabus of Class 11 & 12. Other related sources make up for the rest of the syllabus.

In this post we are providing you MCQ on Double Circulation, which will be beneficial for you in upcoming NEET, AIIMS, JIPMER, PGIMER, CBSE Board, ICSE Board, Class 12th, 11th.

MCQ on Double Circulation

Q1. Oxygenated blood in the cardiac system ________.
a) leaves from right side of the heart
b) leaves from left side of the heart
c) enters lungs from heart
d) does not leave the lungs

Q2. Pick the most appropriate statement as part of explanation for this statement – “Adult human RBCs are enucleate”.
a) Their internal space is available for oxygen transport 
b) They are somatic cells 
c) They do not need to reproduce 
d) They do not metabolise                                                                                                                                                                    

Q3. A patient admitted to the hospital with myocardial infarction is immediately administered with ________.
a) Streptokinase
b) Statins
c) Cyclosporin – A
d) Penicillin

Q4. A stethoscope is used by doctors for cardiac auscultation. The second sound of each cardiac cycle is heard when ________.
a) AV node receives signal from SA node
b) Semilunar valves close down after the blood flows into vessels from ventricles
c) AV valves open up
d) Ventricular walls vibrate due to gushing in of blood from atria

Q5. Identify the correct statement.
a) Double circulation is characteristic of all vertebrates
b) Volume of blood in pulmonary circulation is more than the volume of blood in systemic circulation at any instant
c) blood pressure in pulmonary circulation is less than that of the systemic circulation
d) a double aortic arch is seen in birds and mammals

Q6. Systemic circulation in the cardiac system refers to ________.
a) carry red oxygenated blood
b) carry blood to the left side of the heart
c) carry blood to the right side of the heart
d) carry oxygenated blood from lungs to heart

Q7. The hepatic portal vein drains blood to the liver from ________.
a) stomach
b) heart
c) intestine
d) kidneys

Q8. Blood pressure in the pulmonary artery is ________.
a) same as that in the aorta
b) less than that in venae cavae
c) more than that in the carotid
d) more than that in the pulmonary vein

Q9.  Blood pressure is maximum in mammalian aorta during ________.
a) diastole of the right ventricle
b) systole of the left atrium
c) diastole of the right atrium
d) systole of the left ventricle

Q10. Identify the incorrect statement.
a) occurs only in mammals
b) occurs in all vertebrates
c) is composed of systemic circulation
d) is composed of pulmonary circulation

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By Team Learning Mantras