Nokea
Severing the sensory fibers from the lungs would result in all of the following except
- A. less inhibition of the inspiratory center during forced breathing
- B. a drop in tidal volume
- C. potential damage to the lungs due to overinflation
- D. a disappearance of the Hering-Breuer reflexes
Correct Answer: B
Rationale: The correct answer is B: a drop in tidal volume. Severing sensory fibers from the lungs would lead to decreased feedback to the brain, resulting in less inhibition of the inspiratory center and potentially overinflation of the lungs (choice C). The Hering-Breuer reflexes, responsible for preventing lung over-inflation, would disappear (choice D). However, tidal volume is primarily controlled by the respiratory muscles and respiratory center in the brain, not solely by sensory input from the lungs. Hence, severing sensory fibers would not directly lead to a drop in tidal volume.
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which of the following is a chronic respiratory disorder caused by smoking?
- A. asthma
- B. emphysema
- C. respiratory alkalosis
- D. Acidosis
Correct Answer: B
Rationale: Emphysema is the correct answer because it is a chronic respiratory disorder specifically caused by smoking. Smoking damages the air sacs in the lungs, leading to shortness of breath and difficulty breathing. Asthma is a separate condition involving airway inflammation. Respiratory alkalosis and acidosis refer to imbalances in blood pH levels, not directly caused by smoking.
The most common preventive drug therapy for tuberculosis is:
- A. Prednisone.
- B. Isoniazid.
- C. Gamma globulin.
- D. Aminophylline.
Correct Answer: B
Rationale: The correct answer is B: Isoniazid. Isoniazid is the most common preventive drug therapy for tuberculosis due to its effectiveness in treating latent TB infections. It works by killing the bacteria that cause TB. Prednisone is a steroid and not used as a preventive therapy for TB. Gamma globulin is used for immune deficiency disorders, not TB prevention. Aminophylline is a bronchodilator used for asthma, not TB prevention. In summary, isoniazid is the preferred choice for TB prevention due to its specific antimycobacterial action, while the other options are unrelated or ineffective for this purpose.
Spirometry is used
- A. To detect the amount of Hemoglobin
- B. To detect the air flow through the respiratory system
- C. To check the respiratory quotient
- D. None of these
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.
Which assessment findings aren't consistent with a client diagnosis of right-sided heart failure?
- A. Collapsed neck veins
- B. Distended abdomen
- C. Dependent edema
- D. Decreased appetite
Correct Answer: A
Rationale: The correct answer is A because collapsed neck veins are not consistent with right-sided heart failure. In right-sided heart failure, venous congestion leads to jugular venous distention, not collapse. Distended abdomen (choice B) occurs due to fluid accumulation in the abdomen, a common finding in right-sided heart failure. Dependent edema (choice C) results from fluid retention in the lower extremities, also seen in right-sided heart failure. Decreased appetite (choice D) can be present due to abdominal discomfort from fluid accumulation. Therefore, the presence of collapsed neck veins is the only assessment finding that is not indicative of right-sided heart failure.
What is the relationship between the pressures at label '8'?
- A. P outside = P inside
- B. P outside > P inside
- C. P outside < P inside
- D. P outside + P inside
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'.