Podcast
Questions and Answers
Which of the following factors is the main determinant of vascular resistance on a minute-to-minute basis?
Which of the following factors is the main determinant of vascular resistance on a minute-to-minute basis?
- Length of the blood vessel
- Viscosity of blood
- Radius of the vessel (correct)
- Distribution of Vascular Resistance
Which site represents the primary site of vascular resistance maintaining normal blood pressure?
Which site represents the primary site of vascular resistance maintaining normal blood pressure?
- Cardiac Output
- Kidneys
- Capacitance venules
- Resistance arterioles (correct)
Which of the following hormones is responsible for increasing arterial blood pressure by vasoconstriction?
Which of the following hormones is responsible for increasing arterial blood pressure by vasoconstriction?
- Nitric Oxide
- Prostaglandins
- Angiotensin II (correct)
- Bradykinin
Which endothelium-derived factor is responsible for vasodilation?
Which endothelium-derived factor is responsible for vasodilation?
Which enzyme catalyzes the conversion of angiotensinogen to angiotensin I?
Which enzyme catalyzes the conversion of angiotensinogen to angiotensin I?
What is the main function of angiotensin II?
What is the main function of angiotensin II?
Which hypothesis of autoregulation suggests that acute pressure-induced stretch of the arterial and arteriolar walls stimulates immediate constriction?
Which hypothesis of autoregulation suggests that acute pressure-induced stretch of the arterial and arteriolar walls stimulates immediate constriction?
What is the role of vasopressin (AVP) in regulating vascular resistance?
What is the role of vasopressin (AVP) in regulating vascular resistance?
During exercise, blood flow is redistributed to areas with greater metabolic need. This is an adaptive mechanism that ensures oxygen and nutrients are delivered to active tissues.
During exercise, blood flow is redistributed to areas with greater metabolic need. This is an adaptive mechanism that ensures oxygen and nutrients are delivered to active tissues.
Which layer of blood vessels is composed of concentric layers of smooth muscle cells?
Which layer of blood vessels is composed of concentric layers of smooth muscle cells?
Which type of blood vessel has the thickest walls and can withstand higher pressures?
Which type of blood vessel has the thickest walls and can withstand higher pressures?
Which of the following best describes the primary goal of the pulmonary circulation?
Which of the following best describes the primary goal of the pulmonary circulation?
What is the main function of the systemic circulation?
What is the main function of the systemic circulation?
Which of the following statements about blood flow in the pulmonary circulation is true?
Which of the following statements about blood flow in the pulmonary circulation is true?
What is the purpose of blood flow redistribution in the systemic circulation?
What is the purpose of blood flow redistribution in the systemic circulation?
Which mediator is responsible for preventing orthostatic hypotension?
Which mediator is responsible for preventing orthostatic hypotension?
Which mediator is responsible for reducing circulating volume by stimulating natriuresis and diuresis?
Which mediator is responsible for reducing circulating volume by stimulating natriuresis and diuresis?
Which mediator is targeted by the heart failure drug sacubitril?
Which mediator is targeted by the heart failure drug sacubitril?
Which mediator is responsible for inhibiting platelet aggregation and promoting vasodilation?
Which mediator is responsible for inhibiting platelet aggregation and promoting vasodilation?
According to the Law of Laplace, which of the following occurs when the arterial wall weakens in response to increased pressure, causing a vicious cycle of dilation, increased radius, increased tension, and ultimately a weakened wall?
According to the Law of Laplace, which of the following occurs when the arterial wall weakens in response to increased pressure, causing a vicious cycle of dilation, increased radius, increased tension, and ultimately a weakened wall?
What is the role of nitric oxide (NO) in maintaining vessel patency and vascular wall health?
What is the role of nitric oxide (NO) in maintaining vessel patency and vascular wall health?
What happens to endothelial shear stress in areas of vascular branching and downstream from an atherosclerotic plaque?
What happens to endothelial shear stress in areas of vascular branching and downstream from an atherosclerotic plaque?
What is the major role played by vascular smooth muscle cells and the sympathetic nervous system in blood pressure regulation?
What is the major role played by vascular smooth muscle cells and the sympathetic nervous system in blood pressure regulation?
Which of the following is a compensatory response to an acute drop in blood pressure?
Which of the following is a compensatory response to an acute drop in blood pressure?
What is the most likely cause of the patient's fainting spell?
What is the most likely cause of the patient's fainting spell?
Which of the following is a hypothesis of the origin of hypertension?
Which of the following is a hypothesis of the origin of hypertension?
Which of the following is a possible cause of secondary hypertension?
Which of the following is a possible cause of secondary hypertension?
What is the main function of angiotensin II?
What is the main function of angiotensin II?
What is the main function of the systemic circulation?
What is the main function of the systemic circulation?
