Podcast
Questions and Answers
Which of the following types of muscle fibers are responsible for conducting the impulse to the heart?
Which of the following types of muscle fibers are responsible for conducting the impulse to the heart?
- Contractile muscle fibers
- Nodal muscle fibers (correct)
- Specialized conducting fibers
- Conducting muscle fibers
Where are the Nodal muscle fibers located in the heart?
Where are the Nodal muscle fibers located in the heart?
- Right atrium and left ventricle
- Left atrium and right ventricle
- Interatrial septum and interventricular septum
- Sinoatrial node (SAN) and Atrioventricular node (AVN) (correct)
What is the function of the Atrioventricular node (AVN)?
What is the function of the Atrioventricular node (AVN)?
- Conducts the impulse to the heart (correct)
- Acts as a pacemaker of the heart
- Connected to the Bundle of His
- Located in the right atrium
What is the main function of the atrial muscles?
What is the main function of the atrial muscles?
Where do the Specialized conducting fibers connect in the heart?
Where do the Specialized conducting fibers connect in the heart?
What is the region where the cardiac impulse arises known as?
What is the region where the cardiac impulse arises known as?
How are the ventricular muscle fibers arranged?
How are the ventricular muscle fibers arranged?
Which valve separates the right atrium from the right ventricle?
Which valve separates the right atrium from the right ventricle?
Which part of the heart has Conducting muscle fibers located in it?
Which part of the heart has Conducting muscle fibers located in it?
What is the function of cardiac valves?
What is the function of cardiac valves?
Which structure is important in the regulation of arterial blood pressure?
Which structure is important in the regulation of arterial blood pressure?
What is the main characteristic of atrioventricular valves?
What is the main characteristic of atrioventricular valves?
What is the function of the mitral valve?
What is the function of the mitral valve?
Which component is responsible for the regular beating of the heart?
Which component is responsible for the regular beating of the heart?
What is the role of cordae tendinae in relation to the mitral valve?
What is the role of cordae tendinae in relation to the mitral valve?
Which component of cardiac muscle converts potential energy into mechanical energy?
Which component of cardiac muscle converts potential energy into mechanical energy?
What is the origin of heart rhythm according to the text?
What is the origin of heart rhythm according to the text?
'Pacemaker of the heart' refers to which component mentioned in the text?
'Pacemaker of the heart' refers to which component mentioned in the text?
What is the main cause of the diastolic depolarization during atrial diastole in the SAN action potential?
What is the main cause of the diastolic depolarization during atrial diastole in the SAN action potential?
Which ion is responsible for the upstroke phase (phase 0) of the SAN action potential?
Which ion is responsible for the upstroke phase (phase 0) of the SAN action potential?
What triggers the repolarization phase (phase 3) in the SAN action potential?
What triggers the repolarization phase (phase 3) in the SAN action potential?
What is the role of calcium ions in the SAN action potential?
What is the role of calcium ions in the SAN action potential?
Which channel is responsible for the gradual rise in membrane potential during atrial diastole in the SAN action potential?
Which channel is responsible for the gradual rise in membrane potential during atrial diastole in the SAN action potential?
What is the resting membrane potential of contractile cardiac muscle fibers?
What is the resting membrane potential of contractile cardiac muscle fibers?
What is the main cause of the rapid depolarization in Phase 0 of the action potential of contractile cardiac muscle fibers?
What is the main cause of the rapid depolarization in Phase 0 of the action potential of contractile cardiac muscle fibers?
What characterizes Phase 2 of the action potential in contractile cardiac muscle fibers?
What characterizes Phase 2 of the action potential in contractile cardiac muscle fibers?
Which ion plays a crucial role in the slow prolonged repolarization phase (plateau) of the action potential in cardiac muscle fibers?
Which ion plays a crucial role in the slow prolonged repolarization phase (plateau) of the action potential in cardiac muscle fibers?
What happens during Phase 3 of the action potential in contractile cardiac muscle fibers?
What happens during Phase 3 of the action potential in contractile cardiac muscle fibers?
During which phase does the membrane potential return to its resting level in the action potential of contractile cardiac muscle fibers?
During which phase does the membrane potential return to its resting level in the action potential of contractile cardiac muscle fibers?
What is the duration of depolarization in Phase 2 for atrial muscles compared to ventricular muscles?
What is the duration of depolarization in Phase 2 for atrial muscles compared to ventricular muscles?
