23 Questions
What is the common pulse site known as the 'antecubital region'?
Brachial artery
How does an increase in cardiac output affect blood pressure and flow?
Increases blood pressure and flow
What effect does a narrower and longer vessel have on blood flow and pressure?
Increases resistance, decreases flow, increases pressure
How does the thickness of blood (viscosity) affect blood pressure?
Increases pressure
What happens to blood pressure when there is less blood in the body (hypovolemia)?
Blood pressure decreases
What is the main function of arterioles in the circulatory system?
To slow down blood flow and decrease blood pressure
Which type of capillary has pores that make it permeable to larger molecules?
Fenestrated capillary
What is the diameter range of a muscular artery?
1mm to 10mm
What is the function of a precapillary sphincter?
To allow blood into a capillary bed or not
In what type of capillary is the vessel wall only one cell thick?
Sinusoid capillary
Why is it important for arterioles to always have slightly contracted muscle fibers?
To slow down blood flow and decrease blood pressure
What are the primary sites for diapedesis?
Venules and capillaries
Where does blood in the bone marrow, liver, and integument reside?
Venous reserve
Which blood vessels are considered blood reservoirs?
Veins
What prevents backflow in veins?
Valves
What is the function of vasa vasorum in blood vessels?
Deliver nutrients and remove waste from cells of large vessels
What is the average force driving blood into the vessels known as?
Mean arterial pressure
Which layer of a blood vessel is innervated by nervi vasorum and controlled by hormones and local chemicals?
Tunica media
What is the calculation for pulse pressure?
(Systolic - Diastolic) BP
What is the main function of vasoconstriction in blood vessels?
Decreases blood flow and increases blood pressure
What is the role of the external elastic membrane in large arteries?
Separates the media from the outer tunic
Why do veins have valves?
Make sure blood does not flow backward
What is the main role of the tunica externa in veins?
Holds the vessel in position by binding with surrounding structures
Learn about the structure and functions of venules, veins, and their role in blood circulation. Explore how venules join to form veins, the presence of valves to prevent backflow, and the concept of veins as blood reservoirs.
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