Podcast
Questions and Answers
What is the purpose of the compensatory pause in the heart?
What is the purpose of the compensatory pause in the heart?
- It is long diastole, which is accompanied by the ventricular extrasystole (correct)
- It is long diastole, which is accompanied by the auricular extrasystole
- Diastole, which is going with blood ejection from the ventricles period
- It is a phase of hyperpolarization in the action potential
Why does the heart muscle lack the ability for tetanic contractions?
Why does the heart muscle lack the ability for tetanic contractions?
- Constricts by the 'all or nothing' law
- Contracts slowly
- Has a long duration of the absolute refractory period (correct)
- Obeys to the law by Starling
What prevents the contracting myocardial proteins from responding to additional irritations during ventricular systole?
What prevents the contracting myocardial proteins from responding to additional irritations during ventricular systole?
- It contracts by the 'all or nothing' law
- Absolute refractory phase accords to it (correct)
- Heart muscle has an automatism
- Situates under the permanent influence of the vagus nerve
Which ions play a key role in initiating the constricting process in cardiomyocytes?
Which ions play a key role in initiating the constricting process in cardiomyocytes?
What determines the force of heart muscle contraction?
What determines the force of heart muscle contraction?
Which property of myocardial cells involves a high amplitude of action potential?
Which property of myocardial cells involves a high amplitude of action potential?
What is the pacemaker of the first order?
What is the pacemaker of the first order?
Which of the following is a property of heart conductive myocytes?
Which of the following is a property of heart conductive myocytes?
What is called the heart's ability to get excited spontaneously?
What is called the heart's ability to get excited spontaneously?
Which component belongs to the heart's conductive system?
Which component belongs to the heart's conductive system?
What is the reason for the heart automatism caused?
What is the reason for the heart automatism caused?
Which statement describes the heart pacemaker's automatism ability when it is closer to the arterial ending?
Which statement describes the heart pacemaker's automatism ability when it is closer to the arterial ending?
What is a characteristic feature of pacemaker cells related to their membrane potential?
What is a characteristic feature of pacemaker cells related to their membrane potential?
What is 'low diastolic depolarization' in relation to cardiomyocytes?
What is 'low diastolic depolarization' in relation to cardiomyocytes?
Why does slow diastolic depolarization occur in pacemaker cells?
Why does slow diastolic depolarization occur in pacemaker cells?
Which structure is considered a latent pacemaker of the heart?
Which structure is considered a latent pacemaker of the heart?
Why do latent pacemakers in the heart typically follow the sinoatrial node's rhythm?
Why do latent pacemakers in the heart typically follow the sinoatrial node's rhythm?
