Biology

Cardiovascular and Nervous System

981 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

Heart beat is heard on left side as

  1. aorta is on left side

  2. heart is on left side

  3. ventricles are on left side

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

Heart beat is heard on left side as aorta is on left side.

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

Bicuspid valves are present in between left atrium and left ventricle.It has two cusps, or leaflets,the anteromedial leaflet and the posterolateral leaflet that guard the opening.

Multiple choice

Tricuspid valves are present in between

  1. left atrium and left ventricle

  2. right atrium and right ventricle

  3. left atrium and right atrium

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

Tricuspid valves are present in between right atrium and right ventricle. The function of the valve is to prevent back flow of blood into the right atrium.

Multiple choice

Heart of man is

  1. myogenic

  2. neurogenic

  3. cardiogenic

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

Heart of man is myogenic. Myogenic contraction refers to a contraction initiated by the myocyte cell itself instead of an outside occurrence or stimulus such as nerve innervation.

Multiple choice

Which major organ in our body has the pacemaker?

  1. Lungs

  2. Heart

  3. Kidney

  4. Stomach

  5. Brain
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Heart has the pacemaker (sinu-atrial node), which is present at the place of the origin of heart beat. Without this, a heart beat will not be produced and our heart will not be able to pump blood.

Multiple choice

What is true about the AV node of the human heart?

  1. It conducts impulse very rapidly.

  2. It is highly contractile.

  3. It consists of modified muscle fibres.

  4. It is composed of modified nerve fibres.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

It has the muscle fibres which conduct the impulse.

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.