Q. What is the primary mechanism by which the body regulates blood pressure?
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A.
Hormonal control
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B.
Nervous system control
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C.
Kidney function
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D.
All of the above
Solution
The body regulates blood pressure through a combination of hormonal control, nervous system control, and kidney function.
Correct Answer:
D
— All of the above
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Q. Which component of the heart is responsible for initiating the electrical impulse?
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A.
Atrioventricular node
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B.
Sinoatrial node
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C.
Bundle of His
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D.
Purkinje fibers
Solution
The sinoatrial node is responsible for initiating the electrical impulse that regulates heartbeats.
Correct Answer:
B
— Sinoatrial node
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Q. Which of the following is a function of the endothelium in blood vessels?
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A.
To produce red blood cells
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B.
To regulate vascular tone
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C.
To store nutrients
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D.
To initiate blood clotting
Solution
The endothelium plays a crucial role in regulating vascular tone and maintaining homeostasis in the cardiovascular system.
Correct Answer:
B
— To regulate vascular tone
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