The labia minora and labia majora are parts of which aspect of the female anatomy?

A. Ileocecal sphincter:the ileocecal valve/sphincter regulates flow from ileum to cecum in the GI tract, unrelated to urinary control.
B. Internal urethral sphincter: Incorrect (mostly involuntary) -the internal sphincter (smooth muscle) provides involuntary control of urine retention at the bladder neck via autonomic regulation.
C. Internal anal sphincter: the internal anal sphincter controls fecal continence (involuntary), not urinary flow.
D. External urethral sphincter: the external urethral sphincter is skeletal muscle under voluntary control and allows conscious initiation or delay of urination.

A. It depends on the complete lack of surface tension on the alveolar wall:Alveoli have surface tension; pulmonary surfactant reduces surface tension but does not eliminate it. Quiet expiration does not require an absence of surface tension.
B. It is driven by increased blood CO₂ levels:Elevated CO₂ increases the drive to breathe (affects ventilation rate), but quiet expiration itself is notactively driven by CO₂ -it is passive.
C. It is a passive process that depends on the relaxation of inspiratory muscles:Quiet expiration occurs when the diaphragm and external intercostals relax and elastic recoil of the lungs and chest wall returns air to atmosphere.
D. It requires contraction of abdominal wall muscles:Abdominal muscle contraction is used for forced expiration (e.g., coughing or heavy exercise), not normal quiet expiration.