Biology

Cardiovascular and Nervous System

983 Questions

Review the human cardiovascular system through these competitive exam practice questions. Key areas include heart valves, cardiac impulse pathways, and blood pressure regulation. A solid grasp of these fundamentals is crucial for science sections.

Heart anatomy and valvesCardiac impulse conductionBlood pressure mechanicsHeartbeat regulation

Cardiovascular and Nervous System Questions

Multiple choice

The opening of aortic valve is initiated when

  1. auricles contract

  2. auricular pressure exceeds aortic pressure

  3. ventricles contract

  4. auricular pressure exceed aortic pressure
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This will be the stimulus for aortic valve to open, as the blood will move down the pressure gradient.

Multiple choice

The avian heart is __________.

  1. two–chambered

  2. four–chambered

  3. three–chambered

  4. five–chambered
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Aves (birds) are warm blooded animals and have four chambered heart, e.g. ostrich, duck, etc. Mammals also have four chambered heart. Two-chambered heart- is found in pisces (fishes). Three-chambered heart – is found in amphibia (e.g. frogs, toads) and all reptiles (lizards, snakes) except crocodiles as they have four-chambered heart. Five chambered heart – is not present in any member of the animal kingdom. 

Multiple choice

A heartbeat requires approximately

  1. 0.8 seconds

  2. 0.5 seconds

  3. 1.0 seconds

  4. 1.5 seconds
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A normal resting human heartbeat takes approximately 0.8 seconds, which corresponds to a heart rate of about 75 beats per minute.

Multiple choice

Cardiology is study of

  1. Brain

  2. Heart

  3. Eggs

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cardiology is the medical specialty that deals with disorders of the heart and the cardiovascular system.

Multiple choice

The heart of a man is

  1. myogenic

  2. neurogenic

  3. cardiogenic

  4. digenic
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The heart of a man is myogenic.

Multiple choice

Bicuspid valves are present in between

  1. left atrium and left ventricle

  2. right atrium and right ventricle

  3. left atrium and right atrium

  4. right ventricle and left ventricle
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The mitral valve (also known as the bicuspid valve or left atrioventricular valve) is a dual-flap valve in the heart that lies between the left atrium (LA) and the left ventricle (LV).  

Multiple choice

The heart beat is heard on the left side of the chest as

  1. aorta is present on the left side

  2. heart is present on the left side

  3. ventricles are present on the left side

  4. left ventricle is present on the left side
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The heart beat is heard on the left side of the chest as aorta is present on the left side.

Multiple choice

The atrioventricular node is located on the

  1. right side of interauricular septum

  2. right side of interventricular septum

  3. middle of interauricular septum

  4. middle of interventricular septum
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The atrioventricular node is located on the right side of interauricular septum.

Multiple choice

Which of the following is known as the pacemaker of heart?

  1. Sinu auricular node

  2. Atrio ventricular node

  3. Sino ventricular node

  4. Ventriculo atrial node

  5. -
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

SA node is the heart's natural pacemaker. In the upper part of the right atrium of the heart, there is a specialised bundle of neurons known as the sinoatrial node (SA node).