KROK 1 2017 – Question 117 · KROK (Medicine) · Physiology
A 16-year-old girl fainted when she tried to quickly change her position from horizontal to vertical. What caused the loss of consciousness in the girl?
- A. Increased central venous pressure
- B. Increased arterial pressure
- C. Decreased oncotic plasma pressure
- D. Decreased venous return
- E. Increased venous return
Hint
Think about where gravity makes blood pool when a person stands up quickly, and what that does to cardiac filling, cardiac output and brain perfusion.
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