KROK 1 2007 – Question 191 · KROK (Medicine) · Pathophysiology
A rabbit’s nerve that innervates the right ear was cut and its right superior cervical ganglion was removed. Immediately after operation the temperature of ear skin was measured. It was revealed that the temperature of the rabbit’s ear skin on the side of denervation was by 1.5 °C higher than on the opposite intact side. What of the following is the most probable explanation of the abovementioned effects?
- A. Arterial neuroparalytic hyperemia
- B. Arterial neurotopical hyperemia
- C. Arterial hyperemia induced metabolic factors
- D. Reactive arterial hyperemia
- E. Physiological arterial hyperemia
Hint
Consider what happens to the tone of arteriolar smooth muscle once its constant sympathetic vasoconstrictor input is removed by denervation and ganglion extirpation.
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