Nokea
Carbonic anhydrase
- A. combines with water to form carbonic acid
- B. dissociates into bicarbonate and hydrogen ions.
- C. is normally found in red blood cells.
- D. all of the above
Correct Answer: D
Rationale: Carbonic anhydrase catalyzes the reversible reaction between carbon dioxide and water to form carbonic acid, which then dissociates into bicarbonate and hydrogen ions. It is indeed found in red blood cells, aiding in CO2 transport. Therefore, all the statements are true, making option D the correct answer.
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Which of the following are not present prior to birth?
- A. Pulmonary arterial resistance is high
- B. Pulmonary vessels are collapsed
- C. Rib cage is compressed
- D. Alveoli are expanded
Correct Answer: D
Rationale: The correct answer is D: Alveoli are expanded. Prior to birth, the alveoli in the lungs are collapsed, and they begin to expand and develop after birth when the baby starts breathing air. A: Pulmonary arterial resistance is high due to blood flow bypassing the lungs. B: Pulmonary vessels are collapsed to prevent blood flow in the fetal lungs. C: The rib cage is compressed in the womb due to the limited space, but it expands after birth to allow for lung expansion.
When the nurse reads the diagnosis of centrilobar emphysema, the nurse recognizes that this type of emphysema is characterized by:
- A. No significant smoking history in the patient.
- B. Enlarged and broken down bronchioles, with intact alveoli.
- C. Hypoelastic bronchi and bronchioles.
- D. Deficiency of the enzyme inhibitor alpha "“ antitrypsin.
Correct Answer: B
Rationale: The correct answer is B because centrilobar emphysema is characterized by enlarged and broken down bronchioles with intact alveoli. This type of emphysema primarily affects the respiratory bronchioles and alveolar ducts in the upper lung lobes. The other choices are incorrect because: A) Significant smoking history is usually present in patients with centrilobar emphysema. C) Hypoelastic bronchi and bronchioles are not characteristic of centrilobar emphysema. D) Deficiency of the enzyme inhibitor alpha-1 antitrypsin is associated with a different type of emphysema called panlobar emphysema, not centrilobar emphysema.
Which information from a client helps the nurse confirm the previous diagnosis of chronic stable angina?
- A. The pain wakes me up at night.
- B. The pain is level 3 to 5 (0 to 10 scale).
- C. The pain has gotten worse over the last week.
- D. The pain goes away after I stop jogging.
Correct Answer: D
Rationale: The correct answer is D because chronic stable angina is characterized by chest pain or discomfort that is triggered by physical exertion or emotional stress and relieved by rest or medication. Therefore, the fact that the pain goes away after stopping jogging aligns with the typical pattern of chronic stable angina.
A: The pain waking the client up at night is more indicative of unstable angina or a heart attack.
B: The level of pain on a scale does not provide conclusive evidence of chronic stable angina.
C: Pain worsening over time may suggest unstable angina or a heart attack rather than chronic stable angina.
A nurse is providing tracheostomy care. What action by the nurse requires intervention by the charge nurse?
- A. Holding the device securely when changing ties
- B. Suctioning the client first if secretions are present
- C. Tying a square knot at the back of the neck
- D. Using half-strength peroxide for cleansing
Correct Answer: C
Rationale: The correct answer is C. Tying a square knot at the back of the neck is incorrect because it can be too tight and cause discomfort or restrict airflow. A is correct as holding the device securely is necessary for safety. B is correct as suctioning before changing ties prevents aspiration. D is correct as using half-strength peroxide is appropriate for cleaning. Tying a square knot can lead to complications, making it the action that requires intervention.
A nurse is assessing clients on a rehabilitation unit. Which client is not at risk for airway loss related to aspirated oral and nasopharyngeal secretions?
- A. A 24 year old with a traumatic brain injury
- B. A 36 year old who fractured his left femur
- C. A 58 year old getting radiation therapy
- D. A 66 year old who is a quadriplegic
Correct Answer: B
Rationale: The correct answer is B, a 36-year-old who fractured his left femur. This client is not at risk for airway loss related to aspirated secretions because a femur fracture does not directly impact the airway or swallowing function. Traumatic brain injury (choice A), radiation therapy (choice C), and quadriplegia (choice D) can all impair the client's ability to protect their airway and increase the risk of aspirating secretions. Therefore, these clients are at higher risk compared to the client with a femur fracture.