Controle Of Micturition Flashcards

1
Q

Where is urine collection

A

From kidney via ureter to bladder

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2
Q

Where is urine storage

A

Bladder

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3
Q

Where is urine disposal

A

From bladder via urethra

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4
Q

What controls urine disposal

A

Autonomic NS
Somatic NS override

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5
Q

What are the surface layer of transitional epithelium in the bladder called and what are their function

A

Umbrella cells
Tightly bound together to form a waterproof barrier

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6
Q

Describe the ureterorenal reflex

A

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

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7
Q

Name the layers of the bladder

A

Transitional epithelium
Lamina proprietor
Submucosa
Detrusor muscle
Adventitia

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8
Q

What is the Vesicoureteric reflux

A

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

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9
Q

Which sphincter is controlled involuntarily

A

Internal urethral sphincter

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10
Q

Which NS is the detrusor muscle controlled by

A

Autonomic

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11
Q

Which ganglia innervate the somatic region of the bladder (external sphincter)

A

Pudendal nerve

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12
Q

Which ganglia innervate the internal sphincter

A

Hypogastric and pelvic

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13
Q

Which ganglia send signals to the player sympathetically

A

Hypogastric (from lumbar spinal cord)

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14
Q

Which ganglia signal the bladder parasympathetically

A

Pelvic ( from sacral spinal cord)

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15
Q

What region of the brain controls urination

A

Pons Micturition Centre

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16
Q

Which region of the brain controls voluntary urination

A

Cerebral cortex

17
Q

What causes vesicouretic reflux

A

Failure of vesicouretic reflex

18
Q

What is the Vesicouretic reflex

A

Urine enters bladder via ureter.
Detrusor muscle contracts to keep ureter compressed preventing urine back flow