Double Circulation MCQs
NEET examination has biology questions related to double circulation and students have to prepare this topic with good understanding. In this article, we have highlighted some of the questions which may match the questions in NEET 2025 paper. Before this, we will understand what exactly the topic is about.
Double Circulation in Humans
Humans and most mammals utilise a double circulatory system where blood in the body takes two routes. One of these is used to supply oxygenated blood and the other one route is when deoxygenated blood is supplied back to the heart. The three key elements of the human circulatory system are the heart, blood and blood vessels. It is named double circulation because the blood passes through the heart twice for every cycle or circuit. The right side of the heart pumping sends deoxygenated blood to the lungs and it joins to get oxygenated and is returned back to the heart. The left side of the heart pumps oxygen-rich (also called oxygenated) blood that is newly supplied and gets returned to the heart in a deoxygenated state. This is all about the Double circulatory system in brief.
Now, let’s explore some of the samples for MCQs on double circulation for NEET 2025. It will be very helpful for students who are aspiring to crack NEET with great performances.
MCQs and Answers on Double Circulation for NEET 2025
Below are some of the MCQs on Double circulation for NEET papers which can be considered as samples and aspirants can prepare accordingly.
1. Which of the following is correct?
(a) Double circulation is characteristic of all vertebrates.
(b) Blood volume in pulmonary circulation is higher than the volume of blood in systemic circulation at any instant.
(c) A double aortic arch can be seen in birds and mammals.
(d) Blood pressure in pulmonary circulation is lesser than that of systemic circulation.
Answer: (d)
2. The hepatic portal vein is responsible to drain blood to the liver from
(a) stomach
(b) intestine
(c) heart
(d) kidneys
Answer: (b)
3. Which of the following statements is incorrect about double circulation?
(a) It occurs only in mammals.
(b) It occurs in all vertebrates.
(c) It is composed of systemic circulation.
(d) It is composed of pulmonary circulation.
Answer: (b)
4. Which one is the most appropriate statement(s) as part of the explanation for this statement – “Adult human Red Blood Cells are enucleated”.
I. Their internal space helps in oxygen transport.
II. These are somatic cells.
III. These do not need to reproduce.
IV. These do not metabolise.
(a) Only (II)
(b) Only (I)
(c) (I), (III) and (IV)
(d) (III) and (IV)
Answer: (b)
5. In the pulmonary artery, blood pressure is
(a) more than that in the pulmonary vein.
(b) less than that in venae cavae.
(c) more than that in the carotid.
(d) similar to that in the aorta.
Answer: (a)
6. When doctors use a stethoscope for cardiac auscultation, the second sound of each cardiac cycle is heard when
(a) A signal is received by AV nodes from SA nodes.
(b) AV valves open up.
(c) Semilunar valves close down after the blood flows into vessels from ventricles.
(d) Ventricular walls vibrate because of gushing in blood from atria.
Answer: (c)
7. Blood pressure in the mammalian aorta is maximum 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
Answer: (d)
8. When a patient is rushed to the hospital with myocardial infarction, he/she is immediately administered with
(a) Penicillin
(b) Statins
(c) Cyclosporin – A
(d) Streptokinase
Answer: (d)
9. Systemic circulation refers to
(a) carrying red oxygenated blood.
(b) carrying blood to the left side of the heart.
(c) carrying blood to the right side of the heart.
(d) carrying oxygenated blood from lungs to heart.
Answer: (b)
10. Oxygenated blood in the circulatory system
(a) leaves from the right side of the heart.
(b) enters the lungs from the heart.
(c) leaves from the left side of the heart.
(d) does not leave the lungs.
Answer: (c)
11. The walls of the ventricle consist of thick muscular projection known as:
(a) Columnae carneae
(b) Chordae tendineae
(c) Conus arteriosus
(d) Truncus arteriosus
Answer: (a)
What is the Blood Circulation System ?
All the multicellular organisms need a medium to transfer the nutrients and energy to every part of the body and the cells therein. Blood or blood cells is that medium which performs this job. It carries the glucose molecules and oxygen to every cell and tissues in the body where they react and produce energy and carbon dioxide. This carbon dioxide is then removed from the cells and tissues also by the blood as impurities. To carry out all these functions the system in place is known as the blood circulatory system. The heart is the organ that pumps and receives back the blood. And also the blood containing impurities goes to lungs for purification through another circulation. That is why the complete system is known as double circulation. This is facilitated by the four chambered heart available mostly in mammals and higher organisms.
Blood circulatory system is a very important topic for the NEET exams. Every year some questions are surely asked over this topic. So it is better for students aspiring to get success in NEET or any other medical exam to learn the subject thoroughly as well as practice all the objective questions over this subject. The page above provides you with some previous year questions and sample questions on this topic.
To improve students' problem solving abilities and to appear for the exam with confidence they can use these papers which are easily understandable. It shows you how to solve each problem and question step-by-step and follows all the CCE guidelines.
FAQs on MCQs on Double Circulation for NEET 2025
1. Is the topic of Double circulation important for MBBS students as well ?
Blood is the lifeline of the human body and all the other animals as well. So to understand the functioning of the body we have to thoroughly understand the blood circulation system and its various functions inside the body. As MBBS studies is concerned with the finding out the ailments in a human body and providing necessary remedies for correcting it which is done mostly through the blood circulation system. So it is a basic study in the course of MBBS studies as well.
2. How many marks do I need to obtain in my class 12 to prepare for the NEET exam all by myself ?
NEET is a tough exam for a lot of students. Some students find it easy to score more marks in it. But there are also some students who find it very difficult. The secret to success in NEET is practice. but if you think you lack the efficient practice because your school marks were low in Class 12 board exams will never pose any problem for learning the subjects for NEET . So don't worry about your previous marks and try to learn it with more responsibility this time and you will surely succeed.
3. To secure full marks in my NEET exam I need to follow which objective book ?
It has been general advice to strictly follow the course books for both Central Board of Secondary Education (CBSE) and Indian Council of Secondary Education (ICSE) as the exam pattern is designed by them. So every student must stick to the course structure provided by these Boards. In spite of that there are several other publication houses which publish books to supplement the learning process of the students. One such publication is the Arihant which is very popular among students and teachers as well.
4. Is it enough for my final exams if I follow only the Biology textbook ?
After completing the standard NCERT textbooks provided by your school following the CBSE curriculum you are required to follow another book of relevance to improve your analytical abilities and problem solving skills. Sincerely following any other objective book and solving all its questions helps you a lot in this direction. It is quite enough to complete one extra book if it is a good one. But it is never wrong if you go for as many questions as possible if time permits. It will only benefit you immensely in your learning and never less.
5. Is R D Sharma book essential for NEET exams ?
The medical entrance exams like NEET and others select students by the exams containing questions from only three subjects such as 'Physics,' 'Chemistry,' and 'Biology.' 'Mathematics' is not included in these exams. But, to make it clear, a great portion of the physics syllabus and some parts of chemistry require the chapter of Mathematics as an integral part of the subject matter. The derivation of various formulas and equations in the chapters of physics and chemistry depend greatly on the calculus chapters like Derivation and Integration. If you find a mere studying of the integration is not sufficient for you to use it in your Physics and Chemistry subjects then do go for practice of these concepts by solving questions in R D sharma.
