19 Questions
What is the function of vasa vasorum in the cardiovascular system?
Deliver nutrients and remove waste from the cells of large vessels
Which blood vessels have valves to prevent backflow?
Veins
In the cardiovascular system, what is the primary function of precapillary sphincters?
To allow blood into a capillary bed or not
What is the function of a venule in the cardiovascular system?
Receive blood from capillaries
What is the primary function of arterioles in the cardiovascular system?
Slow down blood flow to decrease blood pressure
Which type of capillary allows plasma proteins and cells to pass through due to its structure?
Sinusoid
What does the external elastic membrane separate in the cardiovascular system?
Media from outer tunic in large arteries
What is the primary function of metarterioles in the cardiovascular system?
Control blood flow into a capillary bed
Which factor has a direct impact on blood pressure and flow resistance in the cardiovascular system?
Viscosity
What happens if mean arterial pressure (MAP) falls below 60 mm Hg for an extended period of time?
Risk of ischemia and hypoxia
What is the role of the skeletal muscle pump in the venous system?
To contract leg muscles and increase pressure on veins
How does vasoconstriction affect the flow in arteries?
Increases pressure and resistance, but decreases flow
What are the main substances that use transporters to move through capillary walls?
Glucose, amino acids, Na+, K+, Ca++, and Cl-
Which factor causes bulk flow to move fluid from capillaries into tissues?
Filtration due to high pressure in capillaries
How much fluid is reabsorbed back into the capillaries each day?
24 L
What hormone targets the kidneys to reabsorb water, increasing blood volume and pressure?
Antidiuretic Hormone (ADH)
How does the Renin-Angiotensin-Aldosterone Mechanism affect blood pressure?
It produces Angiotensin 2 which is a powerful vasoconstrictor
What type of shock involves an inability to deliver adequate oxygen for normal cellular metabolism?
Circulatory Shock
Clinical Considerations: What can chronic high blood pressure (140/90 or above) lead to?
All of the above
Test your knowledge on the structure and function of blood vessels in the cardiovascular system. Learn about the differences between arteries and veins, and how they help maintain blood pressure and circulation. Explore concepts such as lumen size, wall thickness, and the presence of valves in veins.
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