What is a muscle that controls the release of urine?

Answer 1

The smooth muscle (caled the Detrousar muscle) that is part of the bladder contractsto help push urine out. The bladder also has two sphincters the internal, or involuntary and the external, or voluntary sphincters are also muscle.

Answer 2

The main organs involved in urination are the urinary bladder and the urethra. The smooth muscleof the bladder, known as the detrusor, is innervated by sympathetic nervous system fibers from thelumbar spinal cord and parasympathetic fibers from the sacral spinal cord.[1] Fibers in the pelvic nerves constitute the main afferent limb of the voiding reflex; the parasympathetic fibers to the bladder that constitute the excitatory efferent limb also travel in these nerves. Part of the urethra is surrounded by the external urethral sphincter, which is innervated by the somatic pudendal nerveoriginating in the cord, in an area termed Onuf's nucleus.[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. Farther along the urethra is a sphincter of skeletal muscle, the sphincter of the membranous urethra (external urethral sphincter). The bladder's epithelium is termed transitional epithelium which contains a superficial layer of dome-like cells and multiple layers of stratified cuboidal cells underneath when evacuated. When the bladder is fully distended the superficial cells become squamous (flat) and the stratification of the cuboidal is reduced in order to provide lateral stretching.

Answer 3

detrusor urinae - basically the muscular wall of the bladder itself. Additional force can be generated by doing the Valsalva maneuver (ie squeezing your abdominal muscles like you're pooping)

Answer 4

The muscle of the urinary bladder is called the Detrusor muscle. This muscle squeezes all of the urine out of the bladder. Otherwise it is relaxed.

Answer 5

The sphincter

Answer 6

detrousal muscles