例句與造句

1. The muscles controlling micturition are controlled by the parasympathetic stimulation causes the detrusor muscle to contract and the internal urethral sphincter to relax.
2. Smooth muscle bundles pass on either side of the urethra, and these fibers are sometimes called the internal urethral sphincter, although they do not encircle the urethra.
3. Because the internal urethral sphincter is under involuntary control, it is believed to play a role in paruresis, in which a person who perceives himself to be under observation is unable to urinate.
4. It's difficult to find internal urethral sphincter in a sentence. 用internal urethral sphincter造句挺難的