Multiple Choice
The central venous pressure (CVP) reading in hypovolemic shock is typically which of the following?
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17. The Blood
Introduction To Blood
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Which of the following best describes the role of the blood-brain barrier?
A
It regulates the passage of substances from the bloodstream into the brain.
B
It facilitates the exchange of oxygen and carbon dioxide in the lungs.
C
It is responsible for the production of red blood cells.
D
It aids in the digestion and absorption of nutrients in the small intestine.
Verified step by step guidance1
Identify the primary function of the blood-brain barrier, which is to protect the brain by regulating the passage of substances from the bloodstream into the brain.
Understand that the blood-brain barrier is a selective permeability barrier that allows essential nutrients to pass while blocking potentially harmful substances.
Recognize that the blood-brain barrier is not involved in the exchange of gases like oxygen and carbon dioxide, which occurs in the lungs.
Acknowledge that the production of red blood cells is a function of the bone marrow, not the blood-brain barrier.
Clarify that digestion and absorption of nutrients occur in the small intestine, a process unrelated to the blood-brain barrier.
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