Category: S

  • Sessile polyp

    Pendulous soft tissue arising from a mucus membrane with a broad base attachment.  

  • Serum lipase

    Test measuring pancreatic enzyme levels of lipase in the blood.  

  • Serum gastric test

    Laboratory test used to determine level of gastrin in blood serum. A laboratory examination conducted on a blood sample is employed to ascertain the level of the hormone gastrin. Elevated levels of gastrin indicate the presence of a duodenal ulcer or a gastrinoma.  

  • Serous

    A watery, serum-like fluid secreted by the serous membrane that is similar to clear liquid serum of the blood. A cell that secretes a thin, watery, albuminous secretion. Having the nature of serum. The term is used to describe blood serum or clear, watery bodily fluids. It can also refer to anatomical structures that contain…

  • Septotomy

    Incision into the septum of any dividing structure, especially the nasal septum. A surgical cut made in the nasal septum.  

  • Sensory neuron

    Nerves that transmit information back to the central nervous system from the periphery; also known as afferent neuron. A type of neuron that picks up information about a person’s internal and external environment and transmits it to interneurons in the brain or spinal cord.  

  • Semitendinosus muscle

    One of three muscles of the posterior thigh that has a thick tendon attached at the ischium and ends at the medial condyle of the tibia; functions to flex the knee, and extend and rotate the hip.  

  • Semimembranosus muscle

    One of three muscles of the posterior thigh that flexes the knee; extends and rotates the hip when contracted. A muscle of the posterior thigh (the hamstring group) originating on the ischial tuberosity and inserted in the medial condyle of the tibia. It extends the thigh, flexes and medially rotates the leg, and is controlled…

  • Semilunar bone

    A crescent-shaped bone of the wrist.  

  • Seizure threshold

    Level of neurological activity or stimulation that triggers seizure activity.