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CBSE Class 11-science Answered

What is likely to  happen if artery of heart gets constricted due to the accumulation of plaque on its inner wall
Asked by kumarhemkunt | 18 Mar, 2021, 11:29: AM
answered-by-expert Expert Answer
Bernoulli’s principle helps in explaining blood flow in artery. The artery may get constricted due to the accumulation
of plaque on its inner walls. In order to drive the blood through this constriction , heart has to pump the blood with high pressure.
The speed of the flow of the blood in this region is raised which lowers the pressure inside and the artery may collapse
due to the external pressure. The heart exerts further pressure to open this artery and forces the blood through.
As the blood rushes through the opening, the internal pressure once again drops due to same reasons leading to a repeat
collapse. This may result in heart attack.
Answered by Thiyagarajan K | 18 Mar, 2021, 12:08: PM

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CBSE 11-science - Biology
What is likely to  happen if artery of heart gets constricted due to the accumulation of plaque on its inner wall
Asked by kumarhemkunt | 18 Mar, 2021, 11:29: AM
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CBSE 11-science - Biology
question no. 19
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CBSE 11-science - Biology
What is open vascular system  
Asked by yashaschinnu6 | 09 Jan, 2020, 19:57: PM
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CBSE 11-science - Biology
A: elevated levels of sodium Ion increase the heart rate and contact ility R: elevated sodium Ion level increase excitability of s a node
Asked by arushidabhade | 25 Aug, 2019, 14:57: PM
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CBSE 11-science - Biology
A: The resting heart rate about 75 per minutes usually is lower than the autorhythmic rate of SA node (90 to 100 beats per minute) R: at resting condition the parasympathetic effects dominates
Asked by arushidabhade | 25 Aug, 2019, 14:54: PM
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CBSE 11-science - Biology
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Asked by pb_ckt | 28 Apr, 2019, 13:39: PM
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CBSE 11-science - Biology
the right answer in option A but here it is showing option C
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Asked by myschooladviser1 | 12 Feb, 2019, 16:03: PM
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CBSE 11-science - Biology
what will happen if pacemaker is non functional  a. only cardiac muscle will contract rhytically b. the cardiac muscle will not contract in a cordinated manner rhythmically c. cardiac muscle will contract rhythmically in a cordinated manner
Asked by kaintkaku | 02 May, 2018, 08:39: AM
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CBSE 11-science - Biology
Name the two phyla which exhibit the open circulatory system.
Asked by Topperlearning User | 18 Jul, 2014, 14:13: PM
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CBSE 11-science - Biology
Name the germinal layer from which the heart is derived in humans.
Asked by Topperlearning User | 18 Jul, 2014, 14:13: PM
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