Podcast
Questions and Answers
What is the primary controller of coronary blood flow according to the text?
What is the primary controller of coronary blood flow according to the text?
- Neural factors
- Vasodilator metabolites (correct)
- Opening of ATP-sensitive K+ channels
- Pressure changes in the aorta
Which factor can induce vasodilatation in coronary circulation due to lack of oxygen?
Which factor can induce vasodilatation in coronary circulation due to lack of oxygen?
- Increased local concentrations of lactate
- Increased local concentrations of prostaglandins
- Increased local concentrations of H+ (correct)
- Increased local concentrations of K+
What is the mechanism by which hypoxia can increase coronary blood flow according to the text?
What is the mechanism by which hypoxia can increase coronary blood flow according to the text?
- Increased smooth muscle contraction
- Decreased smooth muscle relaxation
- Opening of ATP-sensitive K+ channels (correct)
- Closure of ATP-sensitive K+ channels
What induces reactive hyperemia in the area supplied by a coronary artery if it's occluded and then released according to the text?
What induces reactive hyperemia in the area supplied by a coronary artery if it's occluded and then released according to the text?
Which factor does NOT play a role in inducing vasodilatation in coronary circulation according to the text?
Which factor does NOT play a role in inducing vasodilatation in coronary circulation according to the text?
What type of tachycardia overrides the reduction in left ventricular coronary flow according to the text?
What type of tachycardia overrides the reduction in left ventricular coronary flow according to the text?
What is the role of α-adrenergic receptors in coronary arterioles?
What is the role of α-adrenergic receptors in coronary arterioles?
How does norepinephrine affect coronary vasculature?
How does norepinephrine affect coronary vasculature?
What is the mechanism behind vagal fibers' effect on coronary vessels?
What is the mechanism behind vagal fibers' effect on coronary vessels?
In the presence of a β-adrenergic blocking drug, what effect does noradrenergic stimulation have on coronary blood flow?
In the presence of a β-adrenergic blocking drug, what effect does noradrenergic stimulation have on coronary blood flow?
What is the consequence of systemic blood pressure falling on coronary blood flow regulation?
What is the consequence of systemic blood pressure falling on coronary blood flow regulation?
Which of the following statements is correct regarding coronary blood flow at rest?
Which of the following statements is correct regarding coronary blood flow at rest?
What is the primary mechanism by which the myocardium increases its oxygen consumption during exercise?
What is the primary mechanism by which the myocardium increases its oxygen consumption during exercise?
Which region of the myocardium is most susceptible to ischemic damage and the most common site of myocardial infarction?
Which region of the myocardium is most susceptible to ischemic damage and the most common site of myocardial infarction?
Which of the following factors is primarily responsible for the regulation of coronary blood flow during exercise?
Which of the following factors is primarily responsible for the regulation of coronary blood flow during exercise?
What is the mechanism behind the phenomenon of reactive hyperemia in the coronary circulation?
What is the mechanism behind the phenomenon of reactive hyperemia in the coronary circulation?
Which of the following statements accurately describes the phasic changes in coronary blood flow during the cardiac cycle?
Which of the following statements accurately describes the phasic changes in coronary blood flow during the cardiac cycle?
