131.  Diuretics that inhibit sodium ion reabsorption are called  
A.  xanthines.
B.  osmotic diuretics.
C.  thiazide diuretics.
D.  carbonic anhydrase inhibitors.
E.  ADH inhibitors.

132.  Urea and mannitol are examples of which of the following types of diuretics?  
A.  osmotic diuretics
B.  thiazide diuretics
C.  potassium-sparing diuretics
D.  carbonic anhydrase inhibitors
E.  ADH inhibitors

133.  Diuretics that work by reducing H⁺ secretion and the reabsorption of HCO₃^– ions are classified as  
A.  xanthines.
B.  osmotic diuretics.
C.  thiazide diuretics.
D.  carbonic anhydrase inhibitors.
E.  potassium-sparing diuretics.

134.  Urine flows through the ureters to the bladder as the result of  
A.  gravity.
B.  a pressure gradient.
C.  a concentration gradient.
D.  peristaltic contractions.
E.  osmotic gradient.

135.  Where do the ureters enter the urinary bladder?  
A.  the anterosuperior surface
B.  the anteroinferior surface
C.  the posteromedial surface
D.  the posterolateral surface

136.  What part of the urinary bladder expands very little during bladder filling?  
A.  the fundus
B.  the trigone
C.  the neck
D.  transitional epithelium

137.  What muscle is responsible for contraction of the urinary bladder during micturition?  
A.  trigone
B.  internal urinary sphincter
C.  micturition mucle
D.  detrusor muscle

138.  What type of tissue is responsible for the expansion of the urinary bladder during filling?  
A.  transitional epithelium
B.  stratified squamous epithelium
C.  pseudostratified columnar epithelium
D.  stratified columnar epithelium

139.  Why is the external urinary sphincter under conscious control?  
A.  It is made of smooth muscle.
B.  It is part of the detrusor muscle.
C.  It is made of skeletal muscle.
D.  It is made of adventitia.

140.  How much urine would be in the urinary bladder to increase the pressure to an uncomfortable point?   
A.  100 mL
B.  300 mL
C.  400 mL
D.  500 mL