13 past paper MCQs on Human Heart, from the Circulation unit of MDCAT Biology. The year each question appeared is shown where known; tap “Show answer” for the correct option and a short solution.
1.The heart is surrounded by a tough, inelastic double membranous covering called: (KMU MDCAT 2025)
Correct answer: (c) Pericardium
The pericardium is the double bag around the heart, with fluid between its layers.
2.Identify the location of mitral valve in human heart: (NUMS MDCAT 2025)
Correct answer: (d) Between left atrium and left ventricle
The mitral, or bicuspid, valve guards the opening between the left atrium and the left ventricle.
3.Atrial walls are thinner as compared to ventricles because: (SZABMU MDCAT 2025)
Correct answer: (c) Atria has to force blood into the ventricles which lie very close to them
An atrium has only to push blood into the ventricle just below, so it needs little muscle.
4.Weakened papillary muscles of right ventricle would result in constant back flow of blood into: (NUMS MDCAT 2024)
Correct answer: (a) Right atrium
The papillary muscles hold the tricuspid valve shut, so weak ones let blood back into the right atrium.
5.In human heart, the left atrium receives: (SZABMU MDCAT 2023)
Correct answer: (d) The four Pulmonary Veins
Four pulmonary veins bring oxygenated blood from the lungs into the left atrium.
6.The heart chamber from where aorta originates: (NUMS MDCAT 2023)
Correct answer: (a) Left ventricle
The aorta leaves the left ventricle, which drives blood round the whole body.
7.Regarding structure of the human heart, Chordae Tendinae are present in: (PMC MDCAT 2020)
Correct answer: (c) Ventricles
The chordae tendineae run from the papillary muscles of the ventricles to the cusps of the valves.
8.The thickest chamber of the human heart is: (UHS MDCAT 2018)
Correct answer: (d) Left ventricle
The left ventricle drives blood round the whole body, so its wall is the thickest.
9.Bicuspid valve is present between: (UHS MDCAT 2017)
Correct answer: (a) Left atrium and left ventricle
The bicuspid, or mitral, valve guards the left atrioventricular opening.
10.In human the closed sac which surrounds the heart is: (UHS MDCAT 2016)
Correct answer: (c) Pericardium
The pericardium is the double sac round the heart.
11.Chordae tendinea are fibrous cords attached with: (UHS MDCAT 2016)
Correct answer: (b) Tricuspid valve of heart
The chordae tendineae hold the cusps of the atrioventricular valves against the pressure of systole.
12.Right atrium is separated from right ventricle by: (UHS MDCAT 2015)
Correct answer: (c) Tricuspid Valve
The tricuspid valve guards the right atrioventricular opening.
13.The flaps of tricuspid valves are attached to muscular extensions of right ventricle known as: (UHS MDCAT 2015)
Correct answer: (b) Papillary Muscles
The chordae tendineae run from the papillary muscles to the cusps.