Inflammation of the lung covering causing severe chest pain is

Correct Answer: B

Rationale: The correct answer is B: Pleurisy. Pleurisy is the inflammation of the lung covering (pleura), leading to severe chest pain. Emphysema (A) is a chronic lung disease characterized by damaged air sacs. Asphyxia (C) is a condition of inadequate oxygen supply. Hypoxia (D) is a state of low oxygen levels in tissues. Pleurisy is the best fit as it directly relates to inflammation of the lung covering and severe chest pain.

Correct Answer: B

Rationale: The correct answer is B: To detect the air flow through the respiratory system. Spirometry measures lung function by assessing the volume of air inhaled and exhaled. It helps in diagnosing respiratory conditions like asthma or COPD. Choice A is incorrect because spirometry does not measure hemoglobin levels. Choice C is incorrect as spirometry does not determine the respiratory quotient, which relates to metabolic processes. Choice D is incorrect as spirometry is used for assessing respiratory function.

Correct Answer: C

Rationale: The correct answer is C: Biot's respiration. Biot's respiration is characterized by regular breathing interrupted by periods of apnea. In this scenario, the nurse observed normal breaths followed by a 20-second episode of apnea, which aligns with Biot's respiration. It is crucial to document this finding accurately to ensure appropriate care. Incorrect answers: A: Eupnea refers to normal breathing without any interruptions or irregularities. The presence of apnea in the scenario rules out eupnea. B: Apnea would be an incomplete assessment as it does not capture the alternating pattern of normal breaths and apnea observed in Biot's respiration. D: Cheyne-Stokes breathing involves a cyclical pattern of gradually increasing and decreasing breathing rates, which is not evident in the scenario described.

Correct Answer: A

Rationale: Natural killer (NK) cells are involved in innate immunity as they are able to directly kill virus-infected cells and tumor cells without prior sensitization. They are part of the body's first line of defense against infections. Plasma cells, CD8 T cells, and B memory cells are all part of adaptive immunity, which involves a specific response to pathogens and requires prior exposure. Therefore, they are not involved in innate immunity.

Correct Answer: C

Rationale: The correct answer is C: P outside < P inside. This is because pressure decreases as altitude increases. At label '8', the pressure outside the object (presumably at a higher altitude) is lower than the pressure inside the object. This is due to the decrease in air pressure with increasing altitude. Choice A is incorrect because at higher altitudes, the pressure outside is lower than inside. Choice B is incorrect as it suggests the opposite relationship. Choice D is incorrect as it does not accurately describe the relationship between the pressures at label '8'.