Pharmacology Quiz #10: Micturition Control

1. A 63-year-old man presents to the clinic with complaints of difficulty initiating urination and a feeling of incomplete bladder emptying. Physical examination reveals an enlarged prostate. Which part of the nervous system is primarily responsible for the initiation of micturition that is likely affected in this patient? 

Question 1 of 5

2. A 28-year-old woman suffers a spinal cord injury after a car accident. The injury is localized to the T12 vertebra. She reports an inability to sense when her bladder is full and to control urination. Which of the following best describes her condition? 

Question 2 of 5

3. During a physiology lecture, a professor explains that contraction of the external urethral sphincter is under voluntary control and is mediated by which of the following types of nerve fibers? 

Question 3 of 5

4. A 55-year-old man with benign prostatic hyperplasia is prescribed an alpha-1 adrenergic receptor antagonist to improve his urinary symptoms. This medication primarily aids in urination by acting on which of the following structures? 

Question 4 of 5

5. A research study is conducted to investigate the micturition reflex. The study reveals that a certain type of bladder afferent plays a crucial role in signaling the central nervous system when the bladder is sufficiently distended to initiate the reflex. These afferents are primarily what type of nerve fibers? 

Question 5 of 5


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