1. The problem statement, all variables and given/known data [PLAIN]http://dl.dropbox.com/u/26176167/Screen%20shot%202011-08-05%20at%2012.50.55.png [Broken] Find the 1 incorrect option. 2. Relevant equations 3. The attempt at a solution Well, I'm trying to narrow it down. I know that the spinal cord contains many interneurons/local neurons, so C is correct. I'm not sure where the Soma of afferent and efferent neurons are located. Maybe afferent nuclei are located outside of the spinal chord? I know that the intrafusal fibres in the muscle spindles are supplied by gamma motor neurons, which are controlled by descending neurons from brain. So D is correct?