23 Questions
What is the common pulse site located on the neck?
Carotid artery
What effect does an increase in cardiac output have on blood pressure and blood flow?
Increases blood pressure and blood flow
Which factor contributes to increased resistance in blood vessels?
Longer vessel length
How does decreased blood volume (hypovolemia) affect blood pressure?
Decreases blood pressure
Where should the cuff be placed during blood pressure measurement for accurate readings?
Around the arm at the level of heart
Which layer of the blood vessels is composed of smooth muscle supported by connective tissue?
Tunica media
What is the function of the vasa vasorum in blood vessels?
Delivering nutrients and removing waste from the cells of the large vessels
Which type of blood vessel has valves to prevent backward flow of blood?
Veins
What is the main function of vasoconstriction in blood vessels?
Decreases blood flow and increases blood pressure
Which component separates the tunica media from the outer tunic in large arteries?
External elastic membrane
What is the main function of the tunica externa in blood vessels?
Holding the vessel in position as it binds with surrounding tissues
Which type of artery has a diameter ranging from 0.1mm to 10mm and is characterized by having less elastic fiber and more muscle fiber?
Muscular artery
What is the main function of capillaries?
To supply blood to tissues by perfusion
In which type of capillary does blood flow very slowly due to its flat structure with big gaps and incomplete basement membrane?
Sinusoid capillary
What is the purpose of precapillary sphincters in the circulatory system?
To allow blood into a capillary bed
Why is it important that not all precapillary sphincters are open simultaneously?
To ensure every drop of blood is in a capillary bed
What distinguishes an arteriovenous anastomosis in the circulatory system?
Connection between an arteriole and venule bypassing capillaries
What is the primary function of venules in the circulatory system?
Facilitate the exchange of substances with surrounding tissues
Why do veins have valves?
To prevent backflow due to low pressure and gravity
What is considered the venous reserve in the human body?
Blood in the bone marrow, liver, and integument
How is blood flow measured?
As volume of blood per unit of time through vessel, tissue, and organ
What does MAP stand for in the context of blood pressure?
Mean Arterial Pressure
When is pulse pressure considered high?
After strenuous exercise
Explore the structures and functions of venules and veins in the venous system. Learn about diapedesis, blood flow, blood pressure, and resistance in the circulatory system.
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