Voluntary micturition
A. involves higher brain centers.
B. involves control of the internal sphincter.
C. is a reflex action.
D. is common in infants.
E. involves control of smooth muscle.
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Question 2) 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
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Question 3) Which of the following statements concerning the micturition reflex is false?
A. The micturition reflex is initiated by stretching the bladder wall.
B. Afferent signals are conducted to the sacral segments of the spinal cord by the pelvic nerves.
C. Efferent signals are sent to the bladder by sympathetic fibers in the pelvic nerve.
D. The micturition reflex usually produces a series of contractions of the urinary bladder.
E. The micturition reflex is modified by centers in the pons and cerebrum.
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Question 4) With aging, a loss of inhibitory action potentials to the sacral region of the spinal cord results in
A. increased bladder capacity.
B. voluntary micturition.
C. continuous dribbling of urine.
D. uncontrollable micturition.
E. lack of control of internal sphincter.
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Question 5) In glomerular nephritis, proteins and white blood cells enter the filtrate resulting in
A. increased reabsorption of water.
B. increased reabsorption of sodium.
C. increased secretion of sodium.
D. increased urine output.
E. decreased urine output.
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Question 6) What muscle is responsible for contraction of the urinary bladder during micturition?
A. trigone
B. internal urinary sphincter
C. micturition mucle
D. detrusor muscle
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Question 7) 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
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Question 8) 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.
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Question 9) Where do the ureters enter the urinary bladder?
A. the anterosuperior surface
B. the anteroinferior surface
C. the posteromedial surface
D. the posterolateral surface
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Question 10) What part of the urinary bladder expands very little during bladder filling?
A. the fundus
B. the trigone
C. the neck
D. transitional epithelium
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