Exam 4: Control Of Micturition 197 - 201

Question 1

Micturition

Answer 1

Urination

Question 2

Micturition is controlled by

Answer 2

Nervous system, autonomic spinal cord reflex

Question 3

Trace the signal of the autonomic spinal cord reflex starting from detrusor muscle sensory stretch receptors

Answer 3

— afferent signals sent
— signals enter sacral spinal cord (pelvic nerves)
— return to bladder as parasympathetic fibers inducing contraction of detrusor
— secondary reflex will inhibit internal urethra sphincter
— the cascade results in micturition

Question 4

Micturition can be controlled by voluntary control of the

Answer 4

External urethra sphincter