Multiple Choice
Which of the following statements about the peritubular capillaries is true?
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25. The Urinary System
Introduction to the Urinary System
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In the urinary system, which sphincter do you have voluntary control over?
A
Internal urethral sphincter
B
External urethral sphincter
C
Anal sphincter
D
Pyloric sphincter
Verified step by step guidance1
Identify the location and function of each sphincter mentioned in the problem.
Understand that the internal urethral sphincter is located at the junction of the bladder and urethra and is under involuntary control.
Recognize that the external urethral sphincter surrounds the urethra and is under voluntary control, allowing conscious regulation of urination.
Note that the anal sphincter is involved in the control of defecation, with both internal (involuntary) and external (voluntary) components.
Acknowledge that the pyloric sphincter is located between the stomach and the small intestine and is not under voluntary control.
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