Podcast
Questions and Answers
Which molecule is responsible for the relaxation of blood vessels in response to shear stress?
Which molecule is responsible for the relaxation of blood vessels in response to shear stress?
- cGMP
- Endothelin
- cGTP
- NO (correct)
What is the main action of cGMP-dependent protein kinase?
What is the main action of cGMP-dependent protein kinase?
- Formation of blood clots
- Relaxation of blood vessels (correct)
- Vasoconstriction
- Increase in blood flow
Which substance is released from damaged endothelium and acts as a powerful vasoconstrictor?
Which substance is released from damaged endothelium and acts as a powerful vasoconstrictor?
- Endothelin (correct)
- NO
- cGMP
- cGTP
What happens to vascularity when the metabolism in a tissue is increased for a prolonged period?
What happens to vascularity when the metabolism in a tissue is increased for a prolonged period?
What is the main mechanism for long-term local blood flow regulation?
What is the main mechanism for long-term local blood flow regulation?
What is the term for the increase in vascularity of trained muscles in response to chronic exercise training?
What is the term for the increase in vascularity of trained muscles in response to chronic exercise training?
What is the main effect of inward eutrophic remodeling?
What is the main effect of inward eutrophic remodeling?
What is the main effect of hypertrophic remodeling in larger arteries?
What is the main effect of hypertrophic remodeling in larger arteries?
Which of the following is NOT a specific need for local control of blood flow in tissues?
Which of the following is NOT a specific need for local control of blood flow in tissues?
What are the two phases of local blood flow control?
What are the two phases of local blood flow control?
What is the main action of endothelin released from damaged endothelium?
What is the main action of endothelin released from damaged endothelium?
What is the main action of NO in vascular smooth muscle cells?
What is the main action of NO in vascular smooth muscle cells?
Which blood vessels are involved in the acute control of blood flow?
Which blood vessels are involved in the acute control of blood flow?
What happens to blood flow in a local tissue when the rate of metabolism increases up to 8 times normal?
What happens to blood flow in a local tissue when the rate of metabolism increases up to 8 times normal?
Which condition can cause an increase in tissue blood flow due to reduced oxygen availability?
Which condition can cause an increase in tissue blood flow due to reduced oxygen availability?
What does the second figure in the text show?
What does the second figure in the text show?
What is the main characteristic of long-term control of blood flow?
What is the main characteristic of long-term control of blood flow?
Which of the following is NOT a condition that can cause an increase in tissue blood flow due to reduced oxygen availability?
Which of the following is NOT a condition that can cause an increase in tissue blood flow due to reduced oxygen availability?
What is the approximate effect on blood flow when the arterial oxygen saturation decreases to about 25% of normal?
What is the approximate effect on blood flow when the arterial oxygen saturation decreases to about 25% of normal?
How long does the chronic phase of local blood flow control typically last?
How long does the chronic phase of local blood flow control typically last?
Which of the following substances is NOT suggested as a vasodilator in the vasodilator theory for acute local blood flow regulation?
Which of the following substances is NOT suggested as a vasodilator in the vasodilator theory for acute local blood flow regulation?
What is the name of the theory that suggests that blood vessels dilate in the absence of adequate oxygen?
What is the name of the theory that suggests that blood vessels dilate in the absence of adequate oxygen?
What is the term used to describe the cyclical opening and closing of precapillary sphincters and metarterioles?
What is the term used to describe the cyclical opening and closing of precapillary sphincters and metarterioles?
What is the term for the increase in blood flow through a tissue that occurs when the blood supply is blocked and then unblocked?
What is the term for the increase in blood flow through a tissue that occurs when the blood supply is blocked and then unblocked?
What is the primary factor that mediates myogenic regulation of tissue blood flow?
What is the primary factor that mediates myogenic regulation of tissue blood flow?
Which of the following is NOT a role of endothelial cells in the control of tissue blood flow?
Which of the following is NOT a role of endothelial cells in the control of tissue blood flow?
What is the half-life of nitric oxide in the blood?
What is the half-life of nitric oxide in the blood?
What is the name for the enzyme responsible for synthesizing nitric oxide from arginine and oxygen?
What is the name for the enzyme responsible for synthesizing nitric oxide from arginine and oxygen?
What is the term used to describe the immediate rise in blood flow that occurs in most tissues when arterial pressure is rapidly increased?
What is the term used to describe the immediate rise in blood flow that occurs in most tissues when arterial pressure is rapidly increased?
What is the role of vasodilator substances in the vasodilator theory for acute local blood flow regulation?
What is the role of vasodilator substances in the vasodilator theory for acute local blood flow regulation?
