Podcast
Questions and Answers
What is the main function of autorythmic cells in the heart?
What is the main function of autorythmic cells in the heart?
- Regulate blood pressure
- Act as pacemaker (correct)
- Produce red blood cells
- Conduct oxygen to the heart muscle
During depolarization in action potential generation, what ions flow into the cell?
During depolarization in action potential generation, what ions flow into the cell?
- Fe2+
- Na+ (& Ca2+) (correct)
- Cl-
- K+ (& Mg2+)
What is the main phase of action potential in contractile cells responsible for triggering muscle contraction?
What is the main phase of action potential in contractile cells responsible for triggering muscle contraction?
- Repolarization
- Depolarization (correct)
- Plateau
- Refractory period
What is the purpose of the refractory period in the cardiac cycle?
What is the purpose of the refractory period in the cardiac cycle?
Which term describes a common observation in an Electrocardiogram (ECG) as 'RS' waves during QRS?
Which term describes a common observation in an Electrocardiogram (ECG) as 'RS' waves during QRS?
What is the cardiac cycle defined as?
What is the cardiac cycle defined as?
What is the term used to describe the volume of blood pumped by the heart in one minute?
What is the term used to describe the volume of blood pumped by the heart in one minute?
Which hormone is responsible for increasing heart rate and contractility?
Which hormone is responsible for increasing heart rate and contractility?
What is the term for the amount of blood ejected by the heart in one contraction?
What is the term for the amount of blood ejected by the heart in one contraction?
Which of the following factors directly affects Stroke Volume?
Which of the following factors directly affects Stroke Volume?
What component of the nervous system is responsible for decreasing heart rate?
What component of the nervous system is responsible for decreasing heart rate?
Which ion plays a crucial role in enhancing contractility in cardiac muscle?
Which ion plays a crucial role in enhancing contractility in cardiac muscle?
What is the purpose of coronary circulation?
What is the purpose of coronary circulation?
What is the function of autorhythmic cells in the heart?
What is the function of autorhythmic cells in the heart?
Which circulation involves blood flow between the heart and lungs?
Which circulation involves blood flow between the heart and lungs?
What is a key feature of cardiac muscle cells?
What is a key feature of cardiac muscle cells?
Which part of the heart starts coronary circulation?
Which part of the heart starts coronary circulation?
What is the primary function of systemic circulation?
What is the primary function of systemic circulation?
