Practice free Zoology NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Contraction of right ventricle pumps blood into
The right ventricle of the heart pumps deoxygenated blood into the pulmonary artery, which carries the blood to the lungs for oxygenation. This is a key step in the pulmonary circulation.
In ciculatory system, valves occur in
Artificial pace maker is usually implanted to correct the defect in
The sinoatrial (SA) node is known as the natural pacemaker of the heart. In cases where the SA node is not functioning properly, an artificial pacemaker is implanted to regulate the heart's rhythm by providing electrical impulses to stimulate heartbeats.
The sequence of cardiac cycle is
The correct sequence of the cardiac cycle is atrial systole (contraction of the atria), followed by ventricular systole (contraction of the ventricles), and then joint diastole (relaxation of both atria and ventricles). This sequence ensures efficient pumping of blood through the heart and to the rest of the body.
The blood returning to the heart from lungs via pulmonary vein has more
The pulmonary vein carries oxygenated blood from the lungs back to the heart. Thus, the blood in the pulmonary vein has a higher concentration of oxygen per milliliter compared to other blood vessels.
Systemic heart refers to
The systemic heart refers to the part of the heart that deals with pumping oxygenated blood to the body. In higher vertebrates, this involves the left auricle and left ventricle. The left auricle receives oxygenated blood from the lungs, and the left ventricle pumps it out to the systemic circulation.
Purkinje's fibres are special types of
Purkinje fibers are specialized muscle fibers located in the heart. They are part of the heart's conduction system and play a crucial role in coordinating the contraction of the heart by rapidly conducting electrical impulses.
The pericardium and the pericardial fluid help in
The pericardium is a double-walled sac that contains the heart. The pericardial fluid is present between the layers of the pericardium, and it helps to reduce friction between the heart and surrounding structures during heartbeats. It also provides a cushion to protect the heart from shocks and keeps the heart moist.
For reaching left side of heart, blood must pass through
To reach the left side of the heart, blood must pass through the lungs. Blood from the right ventricle is pumped to the lungs via the pulmonary artery, where it gets oxygenated. This oxygen-rich blood then returns to the left atrium of the heart through the pulmonary veins.
The posterior vena cava
The posterior vena cava, also known as the inferior vena cava in humans, begins at the hind end of the abdomen. It is formed by the joining of the left and right common iliac veins and carries deoxygenated blood from the lower half of the body to the right atrium of the heart.
Ready to ace NEET?
Free access · No credit card required
Yes. You can attempt every Zoology question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.
No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.
The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.