Nokea
larynx have how many cartilages?
- A. 8
- B. 11
- C. 9
- D. 10
Correct Answer: C
Rationale: The larynx consists of 9 cartilages, including the thyroid, cricoid, and epiglottis. These structures provide support and protection to the vocal cords and are essential for phonation and breathing. Choice C is correct because it accurately reflects the number of cartilages in the larynx. Choices A, B, and D are incorrect as they do not correspond to the anatomical structure of the larynx. It is important to understand the specific components of the larynx to correctly identify the number of cartilages present.
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A nurse is caring for an older adult client who has a pulmonary infection. Which action should the nurse take first?
- A. Encourage the client to increase fluid intake.
- B. Assess the client's level of consciousness.
- C. Raise the head of the bed to at least 45 degrees.
- D. Provide the client with humidified oxygen.
Correct Answer: B
Rationale: The correct action for the nurse to take first is to assess the client's level of consciousness (Choice B) because it is essential to determine the client's current neurological status and mental acuity, which can indicate the severity of the infection and the need for immediate interventions. Assessing consciousness helps in identifying any signs of respiratory distress or potential complications. Encouraging fluid intake (Choice A) is important but not the priority when the client's respiratory status is uncertain. Raising the head of the bed (Choice C) is beneficial for improving oxygenation but should come after assessing the client's consciousness. Providing humidified oxygen (Choice D) is important for respiratory support but should be based on the assessment findings.
An assistive personnel (AP) was feeding a client with a tracheostomy. Later that evening the UAP reports that the client had a coughing spell during the meal. What action by the nurse is best?
- A. Assess the client's lung sounds.
- B. Assign a different AP to the client.
- C. Report the AP to the manager.
- D. Request thicker liquids for meals.
Correct Answer: A
Rationale: Correct Answer: A - Assess the client's lung sounds.
Rationale:
1. Assessing lung sounds helps determine if the client is experiencing respiratory distress.
2. Coughing during a meal with a tracheostomy can indicate aspiration or airway obstruction.
3. Prompt assessment can prevent potential complications and guide further interventions.
Summary:
- B: Assigning a different AP does not address the client's immediate respiratory status.
- C: Reporting the AP to the manager is not necessary before assessing the client's condition.
- D: Requesting thicker liquids does not address the underlying issue of potential aspiration or airway obstruction.
Which of the following statements is false?
- A. Hemoglobin functions as a buffer
- B. Bicarbonate ions tend to diffuse out of red blood cells into the blood plasma.
- C. The movement of molecules is in different directions in the metabolically active tissues and the alveoli.
- D. Carbonic anhydrase is an enzyme that promotes the formation of oxyhemoglobin.
Correct Answer: D
Rationale: The correct answer is D because carbonic anhydrase catalyzes the conversion of carbon dioxide and water into bicarbonate ions and protons, not the formation of oxyhemoglobin. Step-by-step rationale: 1. Hemoglobin functions as a buffer by binding to hydrogen ions to help regulate pH levels in the blood. 2. Bicarbonate ions do tend to diffuse out of red blood cells into the plasma to maintain the balance of CO2 and pH. 3. The movement of molecules is indeed different in metabolically active tissues (where oxygen is released and CO2 is taken up) compared to the alveoli (where the opposite occurs). Therefore, choices A, B, and C are all correct statements, making D the false statement.
Nurse Reese is caring for a client hospitalized with acute exacerbation of chronic obstructive pulmonary disease. Which of the following would the nurse expect to note on assessment of this client?
- A. Hypocapnia
- B. A hyperinflated chest noted on the chest x-ray.
- C. Increased oxygen saturation with exercise.
- D. A widened diaphragm noted on the chest x-ray.
Correct Answer: B
Rationale: The correct answer is B: A hyperinflated chest noted on the chest x-ray. In COPD, air trapping leads to hyperinflation of the lungs, causing the chest to appear hyperinflated on x-ray. This is due to the increased residual volume and decreased expiratory flow rates in COPD.
Incorrect choices:
A: Hypocapnia is unlikely in COPD as patients typically retain carbon dioxide due to impaired gas exchange.
C: Increased oxygen saturation with exercise is unlikely in COPD as these patients often have decreased oxygen saturation due to impaired gas exchange.
D: A widened diaphragm would not be a typical finding on chest x-ray in COPD; hyperinflated lungs are more characteristic.
Fick's law of diffusion is related to
- A. Diffusion and Surface area
- B. Diffusion and membrane potential
- C. Diffusion and water content
- D. Diffusion and pore diameter
Correct Answer: A
Rationale: Fick's law of diffusion states that the rate of diffusion is directly proportional to the surface area and concentration gradient, and inversely proportional to the distance over which diffusion occurs. Therefore, Choice A - Diffusion and Surface area is correct because surface area directly affects the rate of diffusion. Choices B, C, and D are incorrect as they do not directly relate to Fick's law. B is incorrect as membrane potential is not a factor in Fick's law. C is incorrect as water content is not a key factor in the law of diffusion. D is incorrect as pore diameter is not explicitly mentioned in Fick's law.