Q: Which chemical reaction is used to build macromolecules from smaller molecules, and what is the general equation for this process?

Dehydration synthesis; $$ \text{A} + \text{B} \rightarrow \text{AB} + \text{H}_2\text{O} $$

Q: A patient is experiencing metabolic acidosis. Which ion is most likely to be secreted by the kidneys to help compensate, and what is the general equation for this compensation?

Hydrogen ($$ \text{H}^+ $$); $$ \text{H}_2\text{CO}_3 \rightarrow \text{H}^+ + \text{HCO}_3^- $$

Question 1

Which of the following best describes the difference between the serosa and adventitia layers of the digestive tract?

Accepted Answer

Serosa is a visceral peritoneum covering intraperitoneal organs, while adventitia is a connective tissue layer covering retroperitoneal organs.

Question 2

A patient has a blockage in the common bile duct. Which digestive process will be most directly affected, and why?

Accepted Answer

Fat digestion, because bile emulsifies fats to increase the surface area for lipase action.

Question 3

Which specialized liver cell is responsible for phagocytosis of bacteria and worn-out red blood cells?

Accepted Answer

Kupffer cell

Question 4

Where does the majority of nutrient absorption occur in the digestive system, and what structural adaptation supports this function?

Accepted Answer

Small intestine; presence of villi and microvilli greatly increases surface area.

Question 5

Which enzyme is responsible for the initial chemical digestion of carbohydrates, and where is it first active?

Accepted Answer

Salivary amylase in the mouth

Question 6

Which hormone is released by the stomach in response to protein-rich food, and what is its primary effect?

Accepted Answer

Gastrin; stimulates secretion of gastric acid by parietal cells

Question 7

Which chemical reaction is used to build macromolecules from smaller molecules, and what is the general equation for this process?

Accepted Answer

Dehydration synthesis; $$ 	ext{A} + 	ext{B} ightarrow 	ext{AB} + 	ext{H}_2	ext{O} $$

Question 8

Which of the following best describes the role of the gut microbiome in digestion?

Accepted Answer

It ferments indigestible carbohydrates, producing short-chain fatty acids and vitamins.

Question 9

Which structure in the nephron is primarily responsible for filtration of blood plasma, and what is the main driving force for this process?

Accepted Answer

Renal corpuscle (glomerulus and Bowman's capsule); hydrostatic pressure

Question 10

A patient is experiencing metabolic acidosis. Which ion is most likely to be secreted by the kidneys to help compensate, and what is the general equation for this compensation?

Accepted Answer

Hydrogen ($$ 	ext{H}^+ $$); $$ 	ext{H}_2	ext{CO}_3 ightarrow 	ext{H}^+ + 	ext{HCO}_3^- $$

Question 11

Which hormone increases water reabsorption in the collecting ducts of the kidney, and what is its effect on urine output?

Accepted Answer

Antidiuretic hormone (ADH); decreases urine output

Question 12

Which of the following correctly traces the path of blood flow through the kidney from the renal artery to the renal vein?

Accepted Answer

Renal artery → interlobar artery → arcuate artery → interlobular artery → afferent arteriole → glomerulus → efferent arteriole → peritubular capillaries → interlobular vein → arcuate vein → interlobar vein → renal vein

Question 13

Which compartment acts as the link between the external and internal environments for fluid exchange in the body?

Accepted Answer

Interstitial fluid

Question 14

Which ion plays the largest role in determining extracellular fluid osmolality?

Accepted Answer

Sodium ($$ 	ext{Na}^+ )$$

Question 15

A patient with chronic kidney disease develops anemia. Which function of the urinary system is most directly impaired, and which hormone is involved?

Accepted Answer

Stimulation of red blood cell synthesis; erythropoietin

Question 16

Which of the following best describes the difference between digestion, absorption, and metabolism?

Accepted Answer

Digestion is the chemical breakdown of nutrients, absorption is the movement of nutrients into the blood, and metabolism is the use of nutrients by cells.

Question 17

Which hormone is released by the small intestine in response to fatty acids and amino acids, and what is its effect on the digestive system?

Accepted Answer

Cholecystokinin (CCK); stimulates gallbladder contraction and pancreatic enzyme secretion

Question 18

Which process is responsible for breaking down macromolecules into smaller molecules, and what is the general equation for this reaction?

Accepted Answer

Hydrolysis; $$ 	ext{AB} + 	ext{H}_2	ext{O} ightarrow 	ext{A} + 	ext{B} $$

Question 19

Which of the following is a major mechanism by which the kidneys regulate acid-base balance?

Accepted Answer

Secretion of hydrogen ions ($$ 	ext{H}^+ ) $$and reabsorption of bicarbonate ($$ 	ext{HCO}_3^- )$$

Comprehensive Study Guidance for Digestive, Urinary, and Fluid Balance Systems (ANP 2086 Exam 3)

Study Guide - Practice Questions

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