A patient is admitted to the hospital with exacerbation of multiple sclerosis (MS). She asks the nurse,"Why did this have to happen to me again? I was doing so well." Explain why some forms of MS are characterized by periods of remission and exacerbation.
What will be an ideal response?
Even though someone is diagnosed with MS, the axons are not damaged. Growing numbers of sodium channels appear spontaneously in the demyelinated fibers so that conduction resumes, even if slower. This may account for the cycles of relapse and remission in different patients.
You might also like to view...
The four most common elements in the body are hydrogen, carbon, calcium, and oxygen
Indicate whether the statement is true or false.
If a fetus in a non-vertex position is not progressing toward birth, what measures might be taken to ensure a more rapid delivery?
What will be an ideal response?
Several layers of epithelial cells with columnar basal cells and squamous free surface cells would be called
A. stratified columnar epithelium. B. simple squamous-columnar epithelium. C. stratified squamous epithelium. D. pseudostratified columnar epithelium.
The stereocilia of cochlear hair cells project into the
A. modiolus. B. basilar membrane. C. tectorial membrane. D. helicotrema. E. spiral ganglion.