Controle Of Micturition Flashcards
Where is urine collection
From kidney via ureter to bladder
Where is urine storage
Bladder
Where is urine disposal
From bladder via urethra
What controls urine disposal
Autonomic NS
Somatic NS override
What are the surface layer of transitional epithelium in the bladder called and what are their function
Umbrella cells
Tightly bound together to form a waterproof barrier
Describe the ureterorenal reflex
Ureters have pain nerve fibres which constrict via reflex when ureters become blocked
Cause vasoconstriction of renal arterials
This prevents excessive flow of fluid into renal pelvis
Name the layers of the bladder
Transitional epithelium
Lamina proprietor
Submucosa
Detrusor muscle
Adventitia
What is the Vesicoureteric reflux
Detrusor muscle doesn’t compress the ureter at the oblique entry
Urine travels backwards from the bladder to the ureters (sometimes to the kidneys)
Cause renal damage
Which sphincter is controlled involuntarily
Internal urethral sphincter
Which NS is the detrusor muscle controlled by
Autonomic
Which ganglia innervate the somatic region of the bladder (external sphincter)
Pudendal nerve
Which ganglia innervate the internal sphincter
Hypogastric and pelvic
Which ganglia send signals to the player sympathetically
Hypogastric (from lumbar spinal cord)
Which ganglia signal the bladder parasympathetically
Pelvic ( from sacral spinal cord)
What region of the brain controls urination
Pons Micturition Centre
