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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
Explain Diapedesis.
Draw the structure of a human heart and label its parts.
Match the items given in Column A with the most appropriate ones in Column B and REWRITE the correct matching pairs :
Column A Column B
(i) Cranial nerves Testosterone
(ii) Leydig cells Natural reflex
(iii) Acetylcholine 12 pairs
(iv) Spinal nerves Prolactin
(v) Sneezing Neurotransmitter
- 18 pairs
- 31 pairs
- Conditioned reflex
Find out my partner.
| Group 'A' | Group 'B' |
| 1. Heart beats | a. 350 ml |
| 2. RBC | b. 7.4 |
| 3. WBC | c. 37∘C |
| 4. Blood donation | d. 72 |
| 5. Normal body Temperature | e. 50-60 lakh/mm3 |
| 6. pH of oxygenated blood | f. 5000-6000 per mm3 |
The oxygen-rich blood from the lungs comes into the ______ of the heart.
Fill in the blanks with suitable words given below:
The oxygen-rich blood is pumped into different parts of the body through ______.
True or false:
People with blood group ‘O’ are called universal recipients
Which of the following health condition refers to the type of blood cancer in which uncontrolled increase in number of WBCs occurs?
From the following identify the normal haemoglobin count in adult male.
The valve which prevents back flow of blood in the veins and lymph vessels is ______.
