24.9 Flashcards
The trigone of the urinary bladder is created by __________.
the internal and external urethral sphincters
the internal and external urethral orifices
the prostatic, membranous, and spongy urethra
the openings to the two ureteral orifices and the internal urethral orifice
The trigone of the urinary bladder is created by __________.
the internal and external urethral sphincters
the internal and external urethral orifices
the prostatic, membranous, and spongy urethra
the openings to the two ureteral orifices and the internal urethral orifice
What initiates the micturition reflex?
The external urethral sphincter relaxes.
The internal urethral sphincter relaxes.
Parasympathetic efferent fibers stimulate the contraction of the detrusor muscle.
Stretch receptors in the wall of the urinary bladder signal the sacral region of the spinal cord.
What initiates the micturition reflex?
The external urethral sphincter relaxes.
The internal urethral sphincter relaxes.
Parasympathetic efferent fibers stimulate the contraction of the detrusor muscle.
Stretch receptors in the wall of the urinary bladder signal the sacral region of the spinal cord.
Voluntary neural control is necessary for __________.
contraction of the detrusor muscle
relaxation of the external urethral sphincter
contraction of the internal urethral sphincter
relaxation of the internal urethral sphincter
Voluntary neural control is necessary for __________.
contraction of the detrusor muscle
relaxation of the external urethral sphincter
contraction of the internal urethral sphincter
relaxation of the internal urethral sphincter
