Class 9 Exam > Class 9 Questions > In terms of being open or closed, what is the...
Start Learning for Free
In terms of being open or closed, what is the state of the mitral and tricuspid valves (left and right atrioventricular valves, respectively) at the end of the first heart sound?
- a)Mitral is closed, tricuspid is open
- b)Mitral is open, tricuspid is closed
- c)Both are open
- d)Both are closed
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
In terms of being open or closed, what is the state of the mitral and ...
The first heart sound, also known as S1, is produced by the closure of the mitral and tricuspid valves. These valves close at the beginning of ventricular systole, which is the contraction phase of the ventricles.
During ventricular systole, the pressure in the ventricles increases as they contract, causing the blood to be forcefully ejected into the pulmonary artery and aorta. In order to prevent backflow of blood into the atria during this contraction, the mitral and tricuspid valves close tightly.
As the ventricles contract, the pressure within the ventricles rises above the pressure in the atria, causing the mitral and tricuspid valves to close simultaneously, generating the first heart sound.
Therefore, at the end of the first heart sound, both the mitral and tricuspid valves are closed (option D). This marks the beginning of ventricular systole and the ejection of blood into the circulation.
Most Upvoted Answer
In terms of being open or closed, what is the state of the mitral and ...
At the end of the first heart sound, both the mitral and tricuspid valves are closed. The first heart sound, also known as S1, is produced when the ventricles contract and the atrioventricular (AV) valves close to prevent the backflow of blood into the atria.
Explanation:
1. Function of the Mitral Valve:
- The mitral valve is located between the left atrium and left ventricle.
- Its function is to prevent the backflow of blood from the left ventricle to the left atrium during ventricular contraction.
- When the left ventricle contracts, the pressure inside the ventricle increases, causing the mitral valve to close and prevent blood from flowing back into the left atrium.
2. Function of the Tricuspid Valve:
- The tricuspid valve is located between the right atrium and right ventricle.
- Its function is to prevent the backflow of blood from the right ventricle to the right atrium during ventricular contraction.
- Similar to the mitral valve, the tricuspid valve closes when the right ventricle contracts, preventing blood from flowing back into the right atrium.
3. First Heart Sound (S1):
- The first heart sound occurs during the systolic phase of the cardiac cycle when the ventricles contract.
- It is caused by the closure of the AV valves, namely the mitral and tricuspid valves.
- The closure of these valves produces a "lub" sound, which is the first heart sound.
4. State of the Mitral and Tricuspid Valves at the End of S1:
- At the end of the first heart sound, both the mitral and tricuspid valves are closed.
- The closure of these valves ensures that blood is pumped out of the ventricles and prevents backflow into the atria.
- This closure helps to maintain the forward flow of blood through the aorta and pulmonary artery, ensuring efficient circulation.
In summary, at the end of the first heart sound (S1), both the mitral and tricuspid valves are closed. This closure prevents the backflow of blood into the atria and ensures the efficient ejection of blood from the ventricles.
Explanation:
1. Function of the Mitral Valve:
- The mitral valve is located between the left atrium and left ventricle.
- Its function is to prevent the backflow of blood from the left ventricle to the left atrium during ventricular contraction.
- When the left ventricle contracts, the pressure inside the ventricle increases, causing the mitral valve to close and prevent blood from flowing back into the left atrium.
2. Function of the Tricuspid Valve:
- The tricuspid valve is located between the right atrium and right ventricle.
- Its function is to prevent the backflow of blood from the right ventricle to the right atrium during ventricular contraction.
- Similar to the mitral valve, the tricuspid valve closes when the right ventricle contracts, preventing blood from flowing back into the right atrium.
3. First Heart Sound (S1):
- The first heart sound occurs during the systolic phase of the cardiac cycle when the ventricles contract.
- It is caused by the closure of the AV valves, namely the mitral and tricuspid valves.
- The closure of these valves produces a "lub" sound, which is the first heart sound.
4. State of the Mitral and Tricuspid Valves at the End of S1:
- At the end of the first heart sound, both the mitral and tricuspid valves are closed.
- The closure of these valves ensures that blood is pumped out of the ventricles and prevents backflow into the atria.
- This closure helps to maintain the forward flow of blood through the aorta and pulmonary artery, ensuring efficient circulation.
In summary, at the end of the first heart sound (S1), both the mitral and tricuspid valves are closed. This closure prevents the backflow of blood into the atria and ensures the efficient ejection of blood from the ventricles.
|
Explore Courses for Class 9 exam
|
|
Top Courses for Class 9View all
Question Description
In terms of being open or closed, what is the state of the mitral and tricuspid valves (left and right atrioventricular valves, respectively) at the end of the first heart sound?a)Mitral is closed, tricuspid is openb)Mitral is open, tricuspid is closedc)Both are opend)Both are closedCorrect answer is option 'D'. Can you explain this answer? for Class 9 2025 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about In terms of being open or closed, what is the state of the mitral and tricuspid valves (left and right atrioventricular valves, respectively) at the end of the first heart sound?a)Mitral is closed, tricuspid is openb)Mitral is open, tricuspid is closedc)Both are opend)Both are closedCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 9 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In terms of being open or closed, what is the state of the mitral and tricuspid valves (left and right atrioventricular valves, respectively) at the end of the first heart sound?a)Mitral is closed, tricuspid is openb)Mitral is open, tricuspid is closedc)Both are opend)Both are closedCorrect answer is option 'D'. Can you explain this answer?.
In terms of being open or closed, what is the state of the mitral and tricuspid valves (left and right atrioventricular valves, respectively) at the end of the first heart sound?a)Mitral is closed, tricuspid is openb)Mitral is open, tricuspid is closedc)Both are opend)Both are closedCorrect answer is option 'D'. Can you explain this answer? for Class 9 2025 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about In terms of being open or closed, what is the state of the mitral and tricuspid valves (left and right atrioventricular valves, respectively) at the end of the first heart sound?a)Mitral is closed, tricuspid is openb)Mitral is open, tricuspid is closedc)Both are opend)Both are closedCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 9 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In terms of being open or closed, what is the state of the mitral and tricuspid valves (left and right atrioventricular valves, respectively) at the end of the first heart sound?a)Mitral is closed, tricuspid is openb)Mitral is open, tricuspid is closedc)Both are opend)Both are closedCorrect answer is option 'D'. Can you explain this answer?.
Solutions for In terms of being open or closed, what is the state of the mitral and tricuspid valves (left and right atrioventricular valves, respectively) at the end of the first heart sound?a)Mitral is closed, tricuspid is openb)Mitral is open, tricuspid is closedc)Both are opend)Both are closedCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 9.
Download more important topics, notes, lectures and mock test series for Class 9 Exam by signing up for free.
Here you can find the meaning of In terms of being open or closed, what is the state of the mitral and tricuspid valves (left and right atrioventricular valves, respectively) at the end of the first heart sound?a)Mitral is closed, tricuspid is openb)Mitral is open, tricuspid is closedc)Both are opend)Both are closedCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
In terms of being open or closed, what is the state of the mitral and tricuspid valves (left and right atrioventricular valves, respectively) at the end of the first heart sound?a)Mitral is closed, tricuspid is openb)Mitral is open, tricuspid is closedc)Both are opend)Both are closedCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for In terms of being open or closed, what is the state of the mitral and tricuspid valves (left and right atrioventricular valves, respectively) at the end of the first heart sound?a)Mitral is closed, tricuspid is openb)Mitral is open, tricuspid is closedc)Both are opend)Both are closedCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of In terms of being open or closed, what is the state of the mitral and tricuspid valves (left and right atrioventricular valves, respectively) at the end of the first heart sound?a)Mitral is closed, tricuspid is openb)Mitral is open, tricuspid is closedc)Both are opend)Both are closedCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice In terms of being open or closed, what is the state of the mitral and tricuspid valves (left and right atrioventricular valves, respectively) at the end of the first heart sound?a)Mitral is closed, tricuspid is openb)Mitral is open, tricuspid is closedc)Both are opend)Both are closedCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Class 9 tests.
|
|
Explore Courses for Class 9 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup