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Which one of the following statem ents is correct ?
- a)The tricuspid and the bicuspid valves open due to the pressure exerted by the simultaneous contraction of the atria
- b)Blood moves freely from atrium to the ventricle during joint diastole.
- c)Increased ventricular pressure causes closing of the semilunar valves.
- d)The atrio-ventricular node (AVN) generates ai action potential to stimulate atrial contraction
Correct answer is option 'B'. Can you explain this answer?
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Which one of the following statem ents is correct ?a)The tricuspid and...
During joint diastole, both the atria and ventricles are relaxed, allowing blood to flow freely from the atria into the ventricles. The tricuspid and bicuspid valves are open during this time, ensuring unidirectional flow from the atria to the ventricles. In contrast, the semilunar valves are closed, preventing backflow of blood into the heart. The atrioventricular node (AVN) does play a role in generating action potentials, but it is responsible for transmitting the signal from the sinoatrial node (SA node) to the ventricles, not for stimulating atrial contraction directly.
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Which one of the following statem ents is correct ?a)The tricuspid and...
Explanation:
The correct statement is option B: "Blood moves freely from atrium to the ventricle during joint diastole."
Explanation:
During the cardiac cycle, the heart goes through two phases - diastole and systole. Diastole is the relaxation phase of the cardiac muscle, while systole is the contraction phase.
During diastole, both the atria and ventricles are relaxed. This allows blood to flow passively from the atria to the ventricles due to the pressure difference between the two chambers. The pressure in the atria is higher than in the ventricles, which causes the tricuspid and bicuspid (mitral) valves to open. These valves are also known as the atrioventricular (AV) valves.
The tricuspid valve is located between the right atrium and right ventricle, while the bicuspid valve is located between the left atrium and left ventricle. When these valves open, blood can flow freely from the atria into the ventricles.
During joint diastole, both the atria and ventricles are in diastole, and the AV valves are open. This allows for the passive filling of the ventricles with blood from the atria.
The other options are incorrect:
a) The tricuspid and bicuspid valves do not open due to the pressure exerted by the simultaneous contraction of the atria. Rather, they open during diastole when the atria are relaxed.
c) Increased ventricular pressure does not cause the closing of the semilunar valves. The semilunar valves, including the aortic and pulmonary valves, open when the ventricles contract (systole) and close when the ventricles relax (diastole).
d) The atrioventricular node (AVN) is responsible for transmitting the electrical signals from the atria to the ventricles. It does not generate an action potential to stimulate atrial contraction. The action potential generated by the AVN leads to the contraction of the ventricles.
In summary, during joint diastole, blood moves freely from the atria to the ventricles due to the pressure difference, and the tricuspid and bicuspid valves (AV valves) open to facilitate this flow.
The correct statement is option B: "Blood moves freely from atrium to the ventricle during joint diastole."
Explanation:
During the cardiac cycle, the heart goes through two phases - diastole and systole. Diastole is the relaxation phase of the cardiac muscle, while systole is the contraction phase.
During diastole, both the atria and ventricles are relaxed. This allows blood to flow passively from the atria to the ventricles due to the pressure difference between the two chambers. The pressure in the atria is higher than in the ventricles, which causes the tricuspid and bicuspid (mitral) valves to open. These valves are also known as the atrioventricular (AV) valves.
The tricuspid valve is located between the right atrium and right ventricle, while the bicuspid valve is located between the left atrium and left ventricle. When these valves open, blood can flow freely from the atria into the ventricles.
During joint diastole, both the atria and ventricles are in diastole, and the AV valves are open. This allows for the passive filling of the ventricles with blood from the atria.
The other options are incorrect:
a) The tricuspid and bicuspid valves do not open due to the pressure exerted by the simultaneous contraction of the atria. Rather, they open during diastole when the atria are relaxed.
c) Increased ventricular pressure does not cause the closing of the semilunar valves. The semilunar valves, including the aortic and pulmonary valves, open when the ventricles contract (systole) and close when the ventricles relax (diastole).
d) The atrioventricular node (AVN) is responsible for transmitting the electrical signals from the atria to the ventricles. It does not generate an action potential to stimulate atrial contraction. The action potential generated by the AVN leads to the contraction of the ventricles.
In summary, during joint diastole, blood moves freely from the atria to the ventricles due to the pressure difference, and the tricuspid and bicuspid valves (AV valves) open to facilitate this flow.
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Which one of the following statem ents is correct ?a)The tricuspid and the bicuspid valves open due to the pressure exerted by the simultaneous contraction of the atriab)Blood moves freely from atrium to the ventricle during joint diastole.c)Increased ventricular pressure causes closing of the semilunar valves.d)The atrio-ventricular node (AVN) generates ai action potential to stimulate atrial contractionCorrect answer is option 'B'. Can you explain this answer?
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Which one of the following statem ents is correct ?a)The tricuspid and the bicuspid valves open due to the pressure exerted by the simultaneous contraction of the atriab)Blood moves freely from atrium to the ventricle during joint diastole.c)Increased ventricular pressure causes closing of the semilunar valves.d)The atrio-ventricular node (AVN) generates ai action potential to stimulate atrial contractionCorrect answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which one of the following statem ents is correct ?a)The tricuspid and the bicuspid valves open due to the pressure exerted by the simultaneous contraction of the atriab)Blood moves freely from atrium to the ventricle during joint diastole.c)Increased ventricular pressure causes closing of the semilunar valves.d)The atrio-ventricular node (AVN) generates ai action potential to stimulate atrial contractionCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following statem ents is correct ?a)The tricuspid and the bicuspid valves open due to the pressure exerted by the simultaneous contraction of the atriab)Blood moves freely from atrium to the ventricle during joint diastole.c)Increased ventricular pressure causes closing of the semilunar valves.d)The atrio-ventricular node (AVN) generates ai action potential to stimulate atrial contractionCorrect answer is option 'B'. Can you explain this answer?.
Which one of the following statem ents is correct ?a)The tricuspid and the bicuspid valves open due to the pressure exerted by the simultaneous contraction of the atriab)Blood moves freely from atrium to the ventricle during joint diastole.c)Increased ventricular pressure causes closing of the semilunar valves.d)The atrio-ventricular node (AVN) generates ai action potential to stimulate atrial contractionCorrect answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which one of the following statem ents is correct ?a)The tricuspid and the bicuspid valves open due to the pressure exerted by the simultaneous contraction of the atriab)Blood moves freely from atrium to the ventricle during joint diastole.c)Increased ventricular pressure causes closing of the semilunar valves.d)The atrio-ventricular node (AVN) generates ai action potential to stimulate atrial contractionCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following statem ents is correct ?a)The tricuspid and the bicuspid valves open due to the pressure exerted by the simultaneous contraction of the atriab)Blood moves freely from atrium to the ventricle during joint diastole.c)Increased ventricular pressure causes closing of the semilunar valves.d)The atrio-ventricular node (AVN) generates ai action potential to stimulate atrial contractionCorrect answer is option 'B'. Can you explain this answer?.
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