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7561 Physiology

Which of the following are TRUE/FALSE regarding pain suppression (“Analgesia”) system in the brain and spinal cord: 1. The raphe magnus nucleus, a thin midline nucleus reticularis paragigantocellularis, is located laterally in the medulla. 2. It consists of two main components. 3. The periaqueductal gray (in midbrain) and periventricular areas of the mesencephalon and upper pons surround the aqueduct of sylvius and poions of the third and fouh ventricles. 4. Enkephalins and serotonin are involved in the analgesia system (brain and spinal cord). 5. A pain inhibitory complex is located in the ventral horns of the spinal cord.

A1,2,3 true & 4,5 false
B2,4,5 true & 1,3 false
C1,3,4 true & 2,5 false
DAll are true
Physiology
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