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प्रश्न
Heart sounds are produced due to ______.
-
closure of tricuspid and bicuspid valves
-
rushing of blood through valves producing turbulence
-
closure of atrioventricular and semilunar valves
-
entry of blood into auricles
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उत्तर
Heart sounds are produced due to closure of tricuspid and bicuspid valves and closure of atrioventricular and semilunar valves.
Explanation:
The first sound "LUBB" is produced when the atrio-ventricular (tricuspid and bicuspid) valves get closed sharply at the start of ventricular systole. The second sound "DUP" is produced when at the beginning of ventricular diastole, the semilunar valves at the roots of aorta and pulmonary artery get closed.
संबंधित प्रश्न
The diagram given below represents a section of the human heart. Answer the questions that follow:
- Which parts of heart are in the diastolic phase? Give a reason to support your answer.
- Label the parts numbered 1 and 2 in the diagram. What type of blood flows through them?
- What causes the heart sounds ‘LUBB’ and ‘DUP’?
- Name the blood vessels that supply oxygenated blood to the heart muscles.
- Draw neat labelled diagrams of a cross section of an artery and a vein.
the Biological/technical term for Blood vessels carrying blood to the left atrium.
Give appropriate biological or technical terms for the following :
The complex consisting of a DNA strand and a core of histones
Differentiate between members of the following pairs with reference to the aspect asked within bracket:
artery and vein (type of blood primarily flowing through)
Choose the correct answer:
English physician who discovered blood circulation was ___________
Fill in the blanks with suitable words given below:
The oxygen-rich blood is pumped into different parts of the body through ______.
_____ gas is transported to all parts of the body.
Reduction in number of ______ can cause clotting disorder, leading to excessive loss of blood from the body.
Name the following:
Contraction phase of heart.
Name these:
Three components of circulatory system.
