19 Questions
Which layer of a blood vessel contains muscles responsible for vasoconstriction and vasodilation?
Tunica media
What is the primary function of the vasa vasorum in blood vessels?
To supply nutrients to the large blood vessels
What is the role of the external elastic membrane in blood vessels?
Separates tunica externa from tunica media
Which type of blood vessels have thicker walls due to higher pressure from pumped blood?
Arteries
Where are the nervi vasorum located in blood vessels?
In tunica media
Which blood vessels have valves to prevent backflow due to low pressure?
Veins
What factor is the greatest and quickest variable to change blood pressure?
Vessel diameter
Where does most noticeable slowdown of blood flow occur?
Artery to arteriole junction
Which system must have greater pressure than the atria during diastole?
Venous system
What is the function of Antidiuretic Hormone (ADH) in response to blood volume drops?
Signal the kidneys to reabsorb water
What hormone, when released by the kidneys, stimulates hematopoiesis?
Erythropoietin (EPO)
What is the role of hydrostatic pressure in the blood vessels?
Drives blood out of capillaries and into tissues
What is the function of tunica externa in the circulatory system?
To hold blood vessels in place
Which type of capillary is the most common in the human body?
Continuous capillary
What is the primary function of venules in the circulatory system?
Forming into veins
What is the relationship between mean arterial pressure and ischemia?
Mean arterial pressure below 60 mm Hg can result in ischemia
Which component of blood pressure represents ventricular contraction?
Systolic BP
Why do veins have valves or shunts in their structure?
To prevent backflow of blood
What is the function of precapillary sphincters in the circulatory system?
Manage blood flow into capillaries
Test your knowledge about the system of arteries, veins, and capillaries in the circulatory system. Learn about the differences between arteries, veins, and capillaries in terms of structure and function.
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