Micturition

Question 1

Define Micturition

Answer 1

the process of the urinary bladder emptying when it is filled

Question 2

1. bladder progressively fills resulting in?

2. Micturition reflex causes ___ and leads to bladder empties/urge to urinate

Answer 2

1. tension on the bladder walls raises above a threshold level
2. nervous reflex

Question 3

1. ___ receptors are initiated as the bladder fills with urine
2. micturition contractions vary in (2), and generally increase as ___
3. Micturition reflex is considered ___
4. initial contracture of the detrusor muscle causes ___
5. further increase in ___, cycle repeats ___, self-regernative cycle begins to ___, bladder ___

Answer 3

1. sensory stretch
2. length of contraction and intensity, more urine is added to the bladder
3. self-regenerative
4. further activation of the stretch receptors
5. reflex contraction, multiple times, fatigue, relaxes

Question 4

1. If bladder was not emptied reflex is ___ by (2)
2. as the bladder continues to fill increases in (2) of micturition reflex
3. As micturition reflex increases reflex passes through the ___ to the ___ and causes (2)
4. ___ reflex
5. most adults in a ____ state can control when they urinate

Answer 4

1. inhibited, minutes or hours
2. frequency and intensity
3. pudendal nerves, external sphincter, relaxation and urination occurs
4. autonomic
5. non-pathologic

Question 5

1. Urination can be facilitated or inhibited by centers in the ___ and ___
2. These higher centers usually have final control of micturition meaning they keep micturition reflex ___ until urination is desired, keep ___ of the ___ even through the micturition reflex, and when urination is desired, these centers cause ___ micturition reflex and relaxation of ___

Answer 5

1. pons and cerebral cortex

2. partially inhibited, tonic contraction, external bladder sphincter, concurrent, external bladder sphincter

Question 6

Voluntary urination -

1. contraction of ___
2. ___ pressure in the bladder
3. increase urine that enters ___, stretches ___, and stimulates ___, which initiates the ___
4. empties all (or most) urine from the ___

Answer 6

1. abdominal muscles
2. increase
3. bladder neck, bladder walls, stretch receptors, micturition reflex
4. bladder