{"id":87303,"date":"2025-06-01T06:39:45","date_gmt":"2025-06-01T06:39:45","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87303"},"modified":"2025-06-01T06:39:45","modified_gmt":"2025-06-01T06:39:45","slug":"lub-dup-sound-is-produced-due-to-action-of","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/lub-dup-sound-is-produced-due-to-action-of\/","title":{"rendered":"\u2018Lub-dup\u2019 sound is produced due to action of"},"content":{"rendered":"

\u2018Lub-dup\u2019 sound is produced due to action of<\/p>\n

[amp_mcq option1=”Large intestine” option2=”Lungs” option3=”Heart” option4=”Oesophagus” correct=”option3″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-1 – 2015<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe ‘lub-dup’ sounds are characteristic heart sounds. The ‘lub’ sound occurs during systole when the atrioventricular valves (mitral and tricuspid) close. The ‘dup’ sound occurs during diastole when the semilunar valves (aortic and pulmonary) close. These sounds are produced by the vibrations of the valves, heart walls, and blood flow.
\n<\/section>\n
\nThe ‘lub-dup’ sounds are associated with the closure of heart valves during the cardiac cycle.
\n<\/section>\n
\nThese sounds can be heard using a stethoscope. Abnormal heart sounds, called murmurs, can indicate underlying issues with valve function or blood flow.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

\u2018Lub-dup\u2019 sound is produced due to action of [amp_mcq option1=”Large intestine” option2=”Lungs” option3=”Heart” option4=”Oesophagus” correct=”option3″] This question was previously asked in UPSC NDA-1 – 2015 Download PDFAttempt Online The ‘lub-dup’ sounds are characteristic heart sounds. The ‘lub’ sound occurs during systole when the atrioventricular valves (mitral and tricuspid) close. The ‘dup’ sound occurs during diastole … <\/p>\n

Detailed Solution\u2018Lub-dup\u2019 sound is produced due to action of<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1093],"tags":[1443,1117,1126],"class_list":["post-87303","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1443","tag-biology","tag-circulatory-system","no-featured-image-padding"],"yoast_head":"\n\u2018Lub-dup\u2019 sound is produced due to action of<\/title>\n<meta name=\"description\" content=\"The 'lub-dup' sounds are characteristic heart sounds. The 'lub' sound occurs during systole when the atrioventricular valves (mitral and tricuspid) close. The 'dup' sound occurs during diastole when the semilunar valves (aortic and pulmonary) close. These sounds are produced by the vibrations of the valves, heart walls, and blood flow. The 'lub-dup' sounds are associated with the closure of heart valves during the cardiac cycle.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/lub-dup-sound-is-produced-due-to-action-of\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u2018Lub-dup\u2019 sound is produced due to action of\" \/>\n<meta property=\"og:description\" content=\"The 'lub-dup' sounds are characteristic heart sounds. The 'lub' sound occurs during systole when the atrioventricular valves (mitral and tricuspid) close. The 'dup' sound occurs during diastole when the semilunar valves (aortic and pulmonary) close. These sounds are produced by the vibrations of the valves, heart walls, and blood flow. 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