Also known as: SM., SM-
SM has various meanings in the Medical category. Discover the full forms, definitions, and usage contexts of SM in Medical.
Smooth muscle is an involuntary non-striated muscle. It is divided into two subgroups; the single-unit (unitary) and multi-unit smooth muscle. Within single-unit cells, the whole bundle or sheet contracts as a syncytium (that is a multinucleate mass of cytoplasm that is not separated into cells). Multi-unit smooth muscle tissues innervate individual cells; as such, they allow for fine control and gradual responses, much like motor unit recruitment in skeletal muscle.
MedicalThe clear liquid that can be separated from clotted blood. Serum differs from plasma, the liquid portion of normal unclotted blood containing the red and white cells and platelets. It is the clot that makes the difference between serum and plasma.Terms in this dictionary with the word serum include maternal serum alpha-fetoprotein (MSAFP), serum glutamic oxaloacetic transaminase (SGOT), serum glutamic pyruvic transaminase (SGPT), and serum hepatitis.
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