Nokea
The partial pressure of oxygen in the interstitial space of peripheral tissues is approximately
- A. 40 mm Hg
- B. 45 mm Hg
- C. 50 mm Hg
- D. 70 mm Hg
Correct Answer: A
Rationale: The correct answer is A: 40 mm Hg. In peripheral tissues, oxygen is delivered by the blood through capillaries. The partial pressure of oxygen in the interstitial space of peripheral tissues is lower than in the blood, around 40 mm Hg. This allows for the diffusion of oxygen from capillaries to cells. Choice B (45 mm Hg) and C (50 mm Hg) are slightly higher pressures and would not promote efficient oxygen diffusion. Choice D (70 mm Hg) is closer to arterial blood oxygen levels and would not allow sufficient oxygen release to tissues. Thus, the correct answer is A as it reflects the physiological conditions necessary for effective oxygen delivery to cells.
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A male client with chronic obstructive pulmonary disease (COPD) is recovering from a myocardial infarction. Because the client is extremely weak and can't produce an effective cough, the nurse should monitor closely for:
- A. Pleural effusion
- B. Pulmonary edema
- C. Atelectasis
- D. Oxygen toxicity
Correct Answer: C
Rationale: The correct answer is C: Atelectasis. In a client with COPD recovering from a myocardial infarction, the weakened state and ineffective cough can lead to the collapse of alveoli, causing atelectasis. This condition can further impair gas exchange and oxygenation, leading to respiratory distress. Monitoring for atelectasis is crucial to prevent complications. Pleural effusion (A) and pulmonary edema (B) are not directly related to the client's condition and symptoms. Oxygen toxicity (D) is a potential concern with high oxygen therapy but is not the most immediate risk for this client scenario.
Tidal volume in human beings is
- A. 1000 ml
- B. 1500 ml
- C. 500 ml
- D. 4.5 ml
Correct Answer: C
Rationale: The correct answer is C: 500 ml. Tidal volume refers to the amount of air inspired or expired during normal breathing. In adult humans, the average tidal volume is around 500 ml. This volume represents the typical amount of air exchanged with each breath. Choices A, B, and D are incorrect because they do not accurately reflect the standard tidal volume in human beings. Option A (1000 ml) and B (1500 ml) are too high for a normal tidal volume, while option D (4.5 ml) is too low. Therefore, the correct answer is C as it aligns with the average tidal volume in human beings.
Which one is a Non-reversible pulmonary disease in which the bronchi are blocked with mucous and infection and rupture of alveoli
- A. Silicosis
- B. Asphyxia
- C. Emphysema
- D. Embolism
Correct Answer: C
Rationale: Emphysema is the correct answer because it is a non-reversible pulmonary disease characterized by the destruction of lung tissue, leading to the blockage of bronchioles and rupture of alveoli. This results in difficulty breathing and reduced oxygen exchange. Silicosis (A) is caused by inhaling silica dust, not related to bronchial blockage. Asphyxia (B) is a condition of suffocation, not related to pulmonary disease. Embolism (D) is the blockage of a blood vessel by a clot, not specific to the bronchi or alveoli.
What is the term used to describe the fluid buildup in the lungs often seen in heart failure patients?
- A. Ascites
- B. Edema
- C. Pleurisy
- D. Effusion
Correct Answer: B
Rationale: The correct answer is B: Edema. In heart failure patients, fluid buildup in the lungs is known as pulmonary edema. This occurs due to the heart's inability to pump effectively, leading to fluid leaking into the lungs' air sacs. Ascites (A) is fluid buildup in the abdomen, not the lungs. Pleurisy (C) is inflammation of the lining around the lungs, not fluid buildup. Effusion (D) refers to fluid accumulation in body cavities like the chest or abdomen, but it is not specific to the lungs like pulmonary edema.
The volume of air that can be exhaled after normal exhalation is the
- A. tidal volume
- B. residual volume
- C. inspiratory reserve volume
- D. expiratory reserve volume
Correct Answer: D
Rationale: The correct answer is D: expiratory reserve volume. After normal exhalation (tidal volume), the expiratory reserve volume represents the additional volume of air that can be forcefully exhaled. This volume is used during activities requiring increased breathing effort. Choices A and C are incorrect because tidal volume is the volume of air inhaled or exhaled during normal breathing, and inspiratory reserve volume is the extra volume of air that can be inhaled after a normal inhalation. Choice B, residual volume, is the volume of air remaining in the lungs after maximal exhalation and cannot be exhaled voluntarily.