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Direction: The following question consists of two statements - Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
Assertion : The muscular walls of ventricles are thicker than auricles.
Reason : This helps in preventing the backflow of blood.
- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true but R is not the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.
- e)Both Assertion and Reason are false.
Correct answer is option 'C'. Can you explain this answer?
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Direction: The following question consists of two statements - Assert...
A is true but R is false. Since ventricles have to pump blood into various organs, they have thicker muscular walls than atria do. Valves prevent backflow of blood.
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Direction: The following question consists of two statements - Assert...
Assertion : The muscular walls of ventricles are thicker than auricles.
Reason : This helps in preventing the backflow of blood.
To understand the relationship between the thickness of the muscular walls of ventricles and auricles and their role in preventing backflow of blood, let's examine the structure and function of these chambers of the heart.
The heart consists of four chambers - two atria (auricles) and two ventricles. The atria receive blood from the body and lungs, while the ventricles pump blood out to various parts of the body. The atria are smaller, thinner-walled chambers located at the top of the heart, while the ventricles are larger, thicker-walled chambers located at the bottom.
1. Structure of the Ventricles and Auricles:
- The ventricles have thicker muscular walls compared to the auricles. This is because the ventricles need to generate a greater force to pump blood to the entire body, while the auricles primarily act as receiving chambers.
- The walls of the ventricles are composed of thick cardiac muscle tissue, which enables them to contract forcefully and pump blood under high pressure. In contrast, the walls of the auricles are thinner and less muscular.
2. Function of the Ventricles and Auricles:
- The thicker walls of the ventricles allow them to contract strongly and pump blood out of the heart with enough force to overcome the resistance of the systemic circulation.
- The atria/auricles, on the other hand, have a relatively weaker contraction since their main function is to receive blood from the veins and transfer it to the ventricles.
- The atria contract first, pushing blood into the ventricles. Then, the ventricles contract forcefully to pump blood out of the heart.
3. Prevention of Backflow:
- The thicker muscular walls of the ventricles are essential for preventing the backflow of blood. When the ventricles contract, the high pressure generated closes the atrioventricular (AV) valves, namely the tricuspid valve on the right side and the bicuspid/mitral valve on the left side.
- The closure of these valves prevents the blood from flowing back into the atria during ventricular contraction. This ensures the forward flow of blood and prevents regurgitation.
Conclusion:
The assertion that the muscular walls of ventricles are thicker than auricles is true. However, the reason provided, which states that this helps in preventing the backflow of blood, is false. The prevention of backflow is primarily achieved by the closure of the AV valves, and the thickness of the ventricular walls is related to their pumping function rather than preventing backflow.
Reason : This helps in preventing the backflow of blood.
To understand the relationship between the thickness of the muscular walls of ventricles and auricles and their role in preventing backflow of blood, let's examine the structure and function of these chambers of the heart.
The heart consists of four chambers - two atria (auricles) and two ventricles. The atria receive blood from the body and lungs, while the ventricles pump blood out to various parts of the body. The atria are smaller, thinner-walled chambers located at the top of the heart, while the ventricles are larger, thicker-walled chambers located at the bottom.
1. Structure of the Ventricles and Auricles:
- The ventricles have thicker muscular walls compared to the auricles. This is because the ventricles need to generate a greater force to pump blood to the entire body, while the auricles primarily act as receiving chambers.
- The walls of the ventricles are composed of thick cardiac muscle tissue, which enables them to contract forcefully and pump blood under high pressure. In contrast, the walls of the auricles are thinner and less muscular.
2. Function of the Ventricles and Auricles:
- The thicker walls of the ventricles allow them to contract strongly and pump blood out of the heart with enough force to overcome the resistance of the systemic circulation.
- The atria/auricles, on the other hand, have a relatively weaker contraction since their main function is to receive blood from the veins and transfer it to the ventricles.
- The atria contract first, pushing blood into the ventricles. Then, the ventricles contract forcefully to pump blood out of the heart.
3. Prevention of Backflow:
- The thicker muscular walls of the ventricles are essential for preventing the backflow of blood. When the ventricles contract, the high pressure generated closes the atrioventricular (AV) valves, namely the tricuspid valve on the right side and the bicuspid/mitral valve on the left side.
- The closure of these valves prevents the blood from flowing back into the atria during ventricular contraction. This ensures the forward flow of blood and prevents regurgitation.
Conclusion:
The assertion that the muscular walls of ventricles are thicker than auricles is true. However, the reason provided, which states that this helps in preventing the backflow of blood, is false. The prevention of backflow is primarily achieved by the closure of the AV valves, and the thickness of the ventricular walls is related to their pumping function rather than preventing backflow.
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Direction: The following question consists of two statements - Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:Assertion : The muscular walls of ventricles are thicker than auricles.Reason : This helps in preventing the backflow of blood.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer?
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Direction: The following question consists of two statements - Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:Assertion : The muscular walls of ventricles are thicker than auricles.Reason : This helps in preventing the backflow of blood.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Direction: The following question consists of two statements - Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:Assertion : The muscular walls of ventricles are thicker than auricles.Reason : This helps in preventing the backflow of blood.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction: The following question consists of two statements - Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:Assertion : The muscular walls of ventricles are thicker than auricles.Reason : This helps in preventing the backflow of blood.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer?.
Direction: The following question consists of two statements - Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:Assertion : The muscular walls of ventricles are thicker than auricles.Reason : This helps in preventing the backflow of blood.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Direction: The following question consists of two statements - Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:Assertion : The muscular walls of ventricles are thicker than auricles.Reason : This helps in preventing the backflow of blood.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction: The following question consists of two statements - Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:Assertion : The muscular walls of ventricles are thicker than auricles.Reason : This helps in preventing the backflow of blood.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer?.
Solutions for Direction: The following question consists of two statements - Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:Assertion : The muscular walls of ventricles are thicker than auricles.Reason : This helps in preventing the backflow of blood.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 10.
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