Question 1

Which of the following best describes the function of bile salts in the digestion of lipids?

Accepted Answer

Bile salts emulsify fats, increasing their surface area for enzyme action.

Question 2

A patient’s urine sample tests positive for glucose. Which of the following is the most likely explanation?

Accepted Answer

The patient’s kidneys are unable to reabsorb all filtered glucose due to hyperglycemia.

Question 3

Which reagent is used to test for the presence of starch in a carbohydrate digestion experiment, and what color change indicates a positive result?

Accepted Answer

Lugol’s iodine; dark blue or black color

Question 4

Which enzyme is primarily responsible for the digestion of proteins in the stomach?

Accepted Answer

Pepsin

Question 5

During a lipid digestion experiment, Sudan Red stain is used. What does a positive result indicate?

Accepted Answer

Presence of lipids

Question 6

Which of the following is NOT a normal component of urine?

Accepted Answer

Glucose

Question 7

Which structure in the nephron is primarily responsible for filtration of blood?

Accepted Answer

Glomerulus

Question 8

A solution turns greenish-brown with Benedict’s reagent during a carbohydrate digestion experiment. What does this indicate?

Accepted Answer

Presence of monosaccharides

Question 9

Which of the following equations correctly represents the hydrolysis of a triglyceride during lipid digestion?

Accepted Answer

$$\mathrm{Triglyceride} + 3\ H_2O \rightarrow 3\ \mathrm{Fatty\ acids} + \mathrm{Glycerol}$$

Question 10

Which of the following best describes the role of the enzyme amylase in digestion?

Accepted Answer

Amylase hydrolyzes starch into maltose and glucose.

Question 11

Which of the following is the correct pathway of blood flow through the kidney?

Accepted Answer

Renal artery → Glomerulus → Peritubular capillaries → Renal vein

Question 12

Which pancreatic enzyme is responsible for the digestion of carbohydrates?

Accepted Answer

Pancreatic amylase

Question 13

Which of the following is a correct interpretation of a Biuret test in a protein digestion experiment?

Accepted Answer

A violet color indicates the presence of proteins.

Question 14

Which of the following is the correct sequence of urine flow through the urinary system?

Accepted Answer

Renal pelvis → Ureter → Bladder → Urethra

Question 15

Which of the following statements about enzymes is TRUE?

Accepted Answer

Enzymes lower the activation energy required for a reaction.

Question 16

Which of the following is a function of the muscular layer of the stomach?

Accepted Answer

Mechanical mixing and churning of food

Question 17

Which of the following best explains the use of phenol red in a lipid digestion experiment?

Accepted Answer

Phenol red indicates a change in pH due to fatty acid production.

Question 18

Which of the following is a correct equation for the hydrolysis of starch by amylase?

Accepted Answer

$$\mathrm{Starch} + H_2O \xrightarrow{\mathrm{Amylase}} \mathrm{Maltose}$$

Question 19

Which of the following is a feature of normal urine?

Accepted Answer

Is typically acidic with a pH around 6

Digestive and Urinary System Laboratory Study Notes

Guida di studio - Domande di pratica