| APR | abdominoperineal resection; absolute proximal reabsorption; acute phase reaction or reactant; amebic... |
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| CPIJH | compass proximal interphalangeal joint hinge |
| FPR | false-positive rate; finger peripheral resistance; fluorescence photobleaching recovery; N-formylpep... |
| LPCT | late proximal cortical tubule |
| P3 | proximal third |
| proximal urethral sphincter | The complete collar of smooth muscle cells of the neck of the urinary bladder which extend distally to surround the preprostatic sportion of the male urethra. There is not a comparable structure in the neck of the femoral bladder; the internal urethral sphincter may exist to prevent reflux of semen into bladder. Synonym: annulus urethralis, internal urethral sphincter, musculus sphincter vesicae, preprostate urethral sphincter, proximal urethral sphincter, sphincter muscle of urinary bladder. (05 Mar 2000) |
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