Nokea
The maximum volume of air contained in the lung by a full forced inhalation is called?
- A. vital capacity
- B. tidal volume
- C. Total lung capacity
- D. inspiratory capacity
Correct Answer: C
Rationale: The correct answer is C: Total lung capacity. This term refers to the maximum volume of air the lungs can hold after a full forced inhalation. It is the sum of vital capacity and residual volume. Vital capacity (A) is the maximum volume of air that can be exhaled after a maximum inhalation, not the maximum volume of air contained in the lungs. Tidal volume (B) is the volume of air inhaled or exhaled during normal breathing, not the maximum volume. Inspiratory capacity (D) is the maximum volume of air that can be inhaled after a normal exhalation, not the maximum volume of air contained in the lungs.
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Total alveolar surface area is reduced in
- A. lung cancer
- B. atelectasis
- C. emphysema
- D. pneumothorax
Correct Answer: C
Rationale: The correct answer is C: emphysema. Emphysema is a condition characterized by the destruction of alveolar walls, leading to a decrease in alveolar surface area for gas exchange. This reduction in surface area impairs the exchange of oxygen and carbon dioxide in the lungs. In contrast, lung cancer (A) primarily affects lung tissue but may not directly reduce alveolar surface area. Atelectasis (B) refers to the collapse of lung tissue, which can impact ventilation but not necessarily alveolar surface area. Pneumothorax (D) is the presence of air in the pleural space and does not directly affect alveolar surface area.
A person met with an accident and died instantly without any injury to heart, brain, stomach and kidney. One of the following is a reason for his death
- A. Intestine got twisted
- B. RBC became coagulated
- C. Stomach stopped digestion
- D. Diaphragm got punctured
Correct Answer: D
Rationale: The correct answer is D: Diaphragm got punctured. The diaphragm is a crucial muscle responsible for breathing. If it gets punctured, it can lead to immediate death due to respiratory failure. In this scenario, since there are no injuries to vital organs like the heart, brain, stomach, or kidney, the only plausible reason for instant death would be a punctured diaphragm affecting the person's ability to breathe.
A: Intestine getting twisted would not lead to instant death without affecting the heart, brain, stomach, or kidney.
B: RBC becoming coagulated would not result in immediate death without directly impacting vital organs.
C: Stomach stopping digestion is not a life-threatening condition that would cause instant death without injury to vital organs.
An older adult is brought to the emergency department by a family member who reports a moderate change in mental status and mild cough. The client is afebrile. The primary health care provider orders a chest x-ray. The family member questions why this is needed since the symptoms seem so vague. What response by the nurse is best?
- A. Chest x-rays are always ordered when we suspect pneumonia.
- B. Older people often have vague symptoms, so an x-ray is essential.
- C. The x-ray can be done and read before laboratory work is reported.
- D. We are testing for any possible source of infection in the client.
Correct Answer: B
Rationale: The correct answer is B because older adults often present with atypical or vague symptoms when they have an underlying infection, including pneumonia. It is crucial to assess for pneumonia in older adults promptly because they may not exhibit classic signs like fever. An x-ray is essential to confirm or rule out pneumonia as it allows for visualization of lung abnormalities.
Choice A is incorrect because not all older adults with vague symptoms automatically have pneumonia, and ordering a chest x-ray is based on clinical judgment. Choice C is incorrect as the timing of the x-ray in relation to laboratory work is not the primary reason for ordering it. Choice D is incorrect because the x-ray is specifically to assess for pneumonia, not for general infection sources.
All of the following provide chemoreceptor input to the respiratory centers of the medulla oblongata except the
- A. olfactory epithelium
- B. medullary chemoreceptors
- C. aortic body
- D. carotid body
Correct Answer: A
Rationale: The correct answer is A: olfactory epithelium. The olfactory epithelium is responsible for detecting smells, not providing chemoreceptor input to the respiratory centers in the medulla oblongata. Medullary chemoreceptors, aortic body, and carotid body are all involved in sensing oxygen, carbon dioxide, and pH levels in the blood, providing crucial input to regulate breathing. The olfactory epithelium is not directly involved in respiratory regulation, making it the exception in this context.
Which of the following signs may be revealed in a client with tonsillar infection by a visual examination if group A streptococci is the cause?
- A. White patches on the tonsils
- B. Hemorrhage in the tonsils
- C. Hypertrophied tonsils
- D. Bleeding in the tonsils
Correct Answer: A
Rationale: The correct answer is A. White patches on the tonsils are characteristic of streptococcal infections, such as strep throat. B (hemorrhage) and D (bleeding) are not typical findings in streptococcal infections. C (hypertrophied tonsils) may occur but is not specific to group A streptococci.