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
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left atrium
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right atrium
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both atria
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left ventricle
A
Correct answer
Explanation
Base of heart is formed by left atrium. It is separated from the vertebral column by the esophagus and aorta.
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right side of interauricular septum
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right side of interventricular septum
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middle of interauricular septum
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middle of interventricular septum
A
Correct answer
Explanation
The atrioventricular node is located on the right side of interauricular septum.
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heartbeat
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systole
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diastole
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heart sound
B
Correct answer
Explanation
The phase of contraction of the heart is termed as systole.
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stomach and intestine
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pulmonary vein and left auricle
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right atrium and right ventricle
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left atrium and left ventricle
D
Correct answer
Explanation
The mitral (bicuspid) valve in mammals guards the opening between left atrium and left ventricle. It has two flaps.
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only auricles will contract
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only ventricles will contract
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cardiac muscles will contract in a coordinated manner
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cardiac muscles will not contract in a coordinated manner
C
Correct answer
Explanation
If the pace maker is absent, cardiac muscles will contract in a coordinated manner because pace maker sets the rhythmic contractions.
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aorta is on left side
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heart is on left side
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ventricles are on left side
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left ventricle is on left side
A
Correct answer
Explanation
Heart beat is heard on left side as aorta is on left side.
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left atrium and left ventricle
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right atrium and right ventricle
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left atrium and right atrium
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right ventricle and left ventricle
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.
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left atrium and left ventricle
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right atrium and right ventricle
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left atrium and right atrium
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left ventricle and right atrium
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.
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Right atrium
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Left atrium
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Right ventricle
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Left ventricle
D
Correct answer
Explanation
Left ventricle has the thickest walls, as it has to pump the blood to whole body.
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myogenic
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neurogenic
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cardiogenic
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digenic
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.
D
Correct answer
Explanation
Human heart has four chambers - two atria and two ventricles.
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Lungs
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Heart
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Kidney
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Stomach
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Brain
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.
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SA node
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AV node
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AV valve
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AV aperture
B
Correct answer
Explanation
It receives the impulse from SA node and directs it down the ventricles.
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The closure of the semilunar valve.
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The opening of the semilunar valve.
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The closure of the AV valve.
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The opening of the AV valve.
C
Correct answer
Explanation
It produces the 'lub' sound of heart beat.
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It conducts impulse very rapidly.
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It is highly contractile.
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It consists of modified muscle fibres.
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It is composed of modified nerve fibres.
C
Correct answer
Explanation
It has the muscle fibres which conduct the impulse.