Question 1

Which of the following best describes the function of the external urethral sphincter in both males and females?

Accepted Answer

It is a circular band of skeletal muscle that acts as a valve under voluntary control.

Question 2

A patient presents with glycosuria. Which plasma glucose concentration most likely exceeds the renal threshold for glucose?

Accepted Answer

$$200\ \mathrm{mg/dl}$$

Question 3

Which anatomical difference between the male and female urethra contributes to the higher incidence of urinary tract infections (UTIs) in females?

Accepted Answer

The female urethra is shorter, providing a shorter path for bacteria to reach the bladder.

Question 4

Which of the following is a direct effect of diuretic therapy?

Accepted Answer

Decrease in blood volume

Question 5

A patient with diabetes develops ketoacidosis. Which of the following best explains the change in blood pH?

Accepted Answer

Presence of ketones from amino acid digestion lowers blood pH.

Question 6

Which of the following best describes the process of micturition?

Accepted Answer

It involves voluntary relaxation of the external urethral sphincter after signals are relayed to the cerebral cortex.

Question 7

Which of the following is most likely to cause urinary retention in elderly males?

Accepted Answer

Enlarged prostate gland compressing the urethra

Question 8

If a person consumes a protein-rich meal, which renal threshold is most likely to be exceeded, resulting in a specific condition?

Accepted Answer

Renal threshold for amino acids, resulting in aminoaciduria

Question 9

Which of the following best explains why infants lack voluntary control over urination?

Accepted Answer

Their central nervous system connections are not mature.

Question 10

A patient presents with kidney stones. Which of the following statements is correct regarding the formation and passage of kidney stones?

Accepted Answer

Kidney stones are formed from solid crystals of dissolved minerals inside the kidneys or ureters and typically leave the body by passage in the urine.

Question 11

Which of the following is a consequence of reduced sensitivity to antidiuretic hormone (ADH) in elderly individuals?

Accepted Answer

Decreased ability to concentrate urine, leading to increased urination

Question 12

During dialysis, which process allows for the removal of waste products such as urea from the blood?

Accepted Answer

Diffusion of waste products across the dialysis membrane

Question 13

Which of the following best describes the mucosal epithelium of the ureter?

Accepted Answer

It contains tight junctions to prevent urine leakage.

Question 14

If the bladder can hold up to $$800\ \mathrm{ml} of $$urine, but pressure is felt beyond $$400\ \mathrm{ml}$$, what is the percentage of bladder capacity at which pressure is typically felt?

Accepted Answer

$$50\%$$

Question 15

Which of the following is a symptom of acidosis due to ketoacidosis?

Accepted Answer

Shortness of breath

Question 16

Which of the following is true regarding the layers of the ureter?

Accepted Answer

It has a mucosal epithelium with tight junctions and two muscle layers.

Question 17

Which of the following best explains why amino acids may appear in urine after a protein-rich meal?

Accepted Answer

The renal threshold for amino acids is lower than for glucose, so excess amino acids are not reabsorbed.

Question 18

Which of the following is a plausible reason for incontinence in elderly individuals?

Accepted Answer

Problems with reflex as motor nerves begin to fail

Question 19

Which of the following is the correct sequence of neural events during voluntary micturition?

Accepted Answer

Interneuron relays sensation to thalamus and cerebral cortex, then motor nerves lead to voluntary relaxation of the external urethral sphincter.

Urinary System: Ureters to Urethra – Structure, Function, and Clinical Aspects

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