$$\text{Specific Gravity} = \frac{\text{Density of urine}}{\text{Density of water}}$$

Question 1

During a urinalysis, which substance's presence most commonly indicates a urinary tract infection?

Accepted Answer

Leukocytes

Question 2

Which anatomical feature of the bladder is primarily responsible for preventing urine leakage until micturition occurs?

Accepted Answer

Internal urethral sphincter

Question 3

A patient’s urine sample has a specific gravity of $$1.035. $$What does this value most likely indicate?

Accepted Answer

Concentrated urine, possibly due to dehydration

Question 4

Which hormone increases water reabsorption in the kidneys by acting on the collecting ducts?

Accepted Answer

Antidiuretic hormone (ADH)

Question 5

What is the primary function of the ureter in the urinary system?

Accepted Answer

Transports urine from the kidney to the bladder

Question 6

Which of the following best describes the term 'turbidity' in a urinalysis?

Accepted Answer

The cloudiness or haziness of urine

Question 7

A diuretic drug is prescribed to a patient. What effect will this have on their urine output?

Accepted Answer

Increase urine output by reducing water reabsorption

Question 8

Which of the following best explains how micturition is controlled?

Accepted Answer

Both autonomic and somatic nervous systems coordinate to relax sphincters and contract the bladder

Question 9

If a patient’s urine sample is positive for glucose, what is the most likely clinical implication?

Accepted Answer

Diabetes mellitus

Question 10

Which anatomical structure connects the bladder to the external environment?

Accepted Answer

Urethra

Question 11

A patient is given a drug that blocks the action of antidiuretic hormone (ADH). What change would you expect in their urine?

Accepted Answer

Urine output increases and urine becomes more dilute

Question 12

Which equation best represents the calculation of specific gravity in urinalysis?

Accepted Answer

$$	ext{Specific Gravity} = \frac{	ext{Density of urine}}{	ext{Density of water}}$$

Question 13

Which hormone acts primarily on the distal convoluted tubule to increase sodium reabsorption, indirectly affecting water reabsorption?

Accepted Answer

Aldosterone

Question 14

A patient presents with cloudy urine and a positive nitrite test. What is the most likely cause?

Accepted Answer

Urinary tract infection

Question 15

Which of the following is NOT a function of the bladder?

Accepted Answer

Filtration of blood

Question 16

During micturition, which muscle contracts to expel urine from the bladder?

Accepted Answer

Detrusor muscle

Question 17

Which nervous system is responsible for voluntary control of the external urethral sphincter during micturition?

Accepted Answer

Somatic nervous system

Question 18

A patient with diabetes insipidus is likely to have which of the following urine characteristics?

Accepted Answer

Low specific gravity and dilute urine

Question 19

Which of the following best describes the process of micturition?

Accepted Answer

Active contraction of the detrusor muscle and relaxation of sphincters

Question 20

A patient’s urine sample is turbid and contains protein. What is the most likely underlying issue?

Accepted Answer

Glomerular damage or kidney disease

BIOL 242 Lab Exam 4 Study Guide – Step-by-Step Guidance

Study Guide - Practice Questions