20 Questions
What is the function of vasa vasorum in blood vessels?
Deliver nutrients and remove waste from the cells of large vessels
What is the main function of precapillary sphincters?
Control blood flow into capillary beds
Which type of artery has a diameter ranging from 0.1mm to 10mm?
Muscular artery
What is the primary function of capillaries in the circulatory system?
Supply blood to tissues by perfusion
What is the function of metarterioles in the circulatory system?
Connect arterioles and capillaries, with a sphincter to regulate blood flow
How are venules different from veins?
Venules are fed by capillaries, while veins carry blood back to the heart
What does diapedesis primarily occur in?
Venules and capillaries
Which factor influences blood flow by increasing resistance in blood vessels?
Viscosity of blood
'Pulse pressure' is defined as the difference between which two readings?
Systolic and diastolic pressure
'Mean arterial pressure (MAP)' is calculated as:
(Diastolic BP) + (Systolic BP - Diastolic BP) / 3
What is the function of the skeletal muscle pump in the venous system?
To increase pressure in veins to push blood towards the heart
Which factor contributes to venoconstriction?
Increases resistance in veins and decreases flow
What is the primary role of capillaries in the circulatory system?
Transport gases, nutrients, and wastes to and from cells
How does filtration differ from reabsorption in capillary exchange?
Filtration moves fluid from high pressure capillary to low pressure tissues, reabsorption is the opposite
How does osmotic pressure affect fluid movement in capillaries?
Decreases fluid reabsorption back into capillaries
What is the role of the lymphatic system in the circulatory system?
To pick up excess fluid filtered by capillaries and return it to circulation
Which hormone targets the kidneys to reabsorb water, increasing blood volume and pressure?
Antidiuretic Hormone (ADH)
What is the primary function of Erythropoietin (EPO) in the vascular system?
Stimulates erythrocyte production in bone marrow
How does autoregulation of perfusion respond to decreased oxygen levels in tissues?
It causes vasoconstriction in arterioles to decrease blood flow
What physiological effect does exercise have on LDL cholesterol levels?
Decreases LDL cholesterol levels
Test your knowledge on the structure and function of blood vessels, including arteries and veins. Explore concepts like lumen size, wall thickness, blood pressure, and the role of valves in veins. Get ready to dive into the details of Chapter 20!
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