Q: Which equation represents Boyle’s law, and how does it relate to pulmonary ventilation?

Boyle’s law: $$P \times V = k$$; as lung volume increases during inspiration, pressure decreases, causing air to flow in.

Question 1

Which of the following best describes the function of the paranasal sinuses in the respiratory system?

Accepted Answer

They filter and humidify incoming air, lighten the skull, and enhance voice resonance.

Question 2

A patient with emphysema has lost significant alveolar surface area. Which of the following best explains how this affects gas exchange?

Accepted Answer

Decreased alveolar surface area reduces the rate of diffusion, leading to impaired oxygen and carbon dioxide exchange.

Question 3

Which equation represents Boyle’s law, and how does it relate to pulmonary ventilation?

Accepted Answer

Boyle’s law: $$P 	imes V = k$$; as lung volume increases during inspiration, pressure decreases, causing air to flow in.

Question 4

Which of the following is a protective mechanism of the respiratory system that directly prevents pathogens from entering the lower respiratory tract?

Accepted Answer

Cilia in the trachea move mucus and trapped particles upward toward the pharynx.

Question 5

Which of the following best describes the difference between the conducting zone and the respiratory zone?

Accepted Answer

The conducting zone transports air but does not participate in gas exchange, while the respiratory zone is where gas exchange occurs.

Question 6

A pulmonary function test reveals an increased residual volume and decreased vital capacity. Which condition is most likely present?

Accepted Answer

Emphysema

Question 7

According to Dalton’s law, which equation describes the total pressure of a gas mixture?

Accepted Answer

$$P_{total} = P_1$ + P_2$ + P_3$ + \ldots$$

Question 8

Which mechanism is primarily responsible for the formation of concentrated urine in the kidney?

Accepted Answer

The medullary osmotic gradient established by the countercurrent multiplier and exchanger.

Question 9

Which equation best represents the net filtration pressure (NFP) in the glomerulus?

Accepted Answer

$$NFP = (HP_{gc}) - (OP_{gc} + HP_{cs})$$

Question 10

A patient is experiencing metabolic acidosis. Which of the following compensatory mechanisms will the body use to restore acid-base balance?

Accepted Answer

Increase respiratory rate to decrease CO$$_2$$ and raise blood pH.

Question 11

Which of the following is a major function of tubular secretion in the nephron?

Accepted Answer

Elimination of unwanted solutes and regulation of blood pH.

Question 12

Which buffer system is most effective in resisting pH changes in the extracellular fluid?

Accepted Answer

The bicarbonate buffer system: $$CO_2 + H_2O$$ \leftrightarrow H_2CO_3 \leftrightarrow H^+ + $$HCO_3$$^-$$

Question 13

Which hormone increases sodium reabsorption in the distal tubule and collecting duct, thereby affecting blood volume and pressure?

Accepted Answer

Aldosterone

Question 14

Which of the following best describes the difference between innate and adaptive immunity?

Accepted Answer

Innate immunity is non-specific and present at birth, while adaptive immunity is specific and develops after exposure to antigens.

Question 15

Which process describes the activation and clonal selection of B cells in humoral immunity?

Accepted Answer

B cells bind to a specific antigen, undergo clonal expansion, and differentiate into plasma cells and memory cells.

Question 16

Which antibody class is most abundant in plasma and is responsible for secondary immune responses?

Accepted Answer

IgG

Question 17

A patient with chronic bronchitis is likely to experience which of the following consequences?

Accepted Answer

Excess mucus production and impaired ciliary function, leading to increased risk of infection.

Question 18

Which equation best represents Henry’s law, and how does it relate to gas exchange in the lungs?

Accepted Answer

Henry’s law: $$C = k 	imes P$$; the concentration of a gas dissolved in a liquid is proportional to its partial pressure.

Question 19

Which of the following is a real-life example of an autoimmune disorder, and what is a key factor involved?

Accepted Answer

Type 1 diabetes; loss of self-tolerance leads to destruction of pancreatic beta cells by T lymphocytes.

BIO 2202 Exam 2 Study Guide: Respiratory, Urinary, Fluid & Electrolyte, and Immune Systems

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