ATI RN
Multiple Choice Questions About Respiratory System Questions
Question 1 of 5
Pulmonary ventilation also called
Correct Answer: C
Rationale: The correct answer is C: Breathing. Pulmonary ventilation refers to the process of breathing, which involves both inhalation and exhalation. Inhalation is the act of taking in air, while exhalation is the act of expelling air. Therefore, the term "pulmonary ventilation" encompasses both inhalation and exhalation, making choice C the correct answer. Choices A and B are incorrect because they only represent one part of the breathing process. Choice D is incorrect because it suggests that all choices are correct, which is not accurate in this context.
Question 2 of 5
Which metal ion is often present in the active site of carbonic anhydrase enzymes?
Correct Answer: C
Rationale: The correct answer is C: Zinc (Zn). Zinc is often present in the active site of carbonic anhydrase enzymes because it plays a crucial role in catalyzing the conversion of carbon dioxide to bicarbonate and protons. Zinc ions have the appropriate coordination geometry and charge to facilitate this reaction efficiently. Iron (Fe) is not typically found in the active site of carbonic anhydrase enzymes. Calcium (Ca) and Magnesium (Mg) do not have the appropriate properties to serve as the catalytic metal ion in this enzyme. Therefore, zinc (Zn) is the correct answer due to its specific role and properties in the catalytic mechanism of carbonic anhydrase enzymes.
Question 3 of 5
A nurse in a medical unit is caring for a client with heart failure. The client suddenly develops extreme dyspnea,tachycardia and lung crackles. The nurse immediately asks another nurse to contact the primary health care provider and prepares to implement ALL priority interventions EXCEPT?
Correct Answer: C
Rationale: Rationale: Option C, transporting the client to the coronary care unit, is not the priority intervention because the client is presenting with acute pulmonary edema, a sign of worsening heart failure. Administering oxygen (Option A) is crucial to improve oxygenation. Administering furosemide (Option B) helps reduce fluid overload. Obtaining a stat Hepatic Panel (Option D) may be necessary to assess liver function due to medication side effects. However, immediate actions to address respiratory distress and tachycardia take precedence over moving the client to another unit.
Question 4 of 5
When CO2 diffuses into blood in systemic capillaries most of it:
Correct Answer: C
Rationale: The correct answer is C because the majority of CO2 diffusing into blood combines with water inside red blood cells (RBC) to form carbonic acid, which then dissociates into bicarbonate ions and hydrogen ions. This reaction is facilitated by the enzyme carbonic anhydrase. This process allows for efficient transport of CO2 in the bloodstream. Choices A and B are incorrect as CO2 primarily undergoes conversion to bicarbonate ions, not remaining in solution as CO2 or forming carbamino compounds. Option D is incorrect as CO2 does not directly combine with hemoglobin.
Question 5 of 5
You are up very high where barometric pressure is 447 mmHg. What is the partial pressure of oxygen in the air up there?
Correct Answer: C
Rationale: The correct answer is C (80 mmHg) because the partial pressure of oxygen in the air is directly proportional to the percentage of oxygen in the air. In the atmosphere, oxygen makes up approximately 21% of the air. Therefore, to calculate the partial pressure of oxygen, you would multiply the total barometric pressure by the percentage of oxygen (0.21). So, 447 mmHg x 0.21 = 94.07 mmHg. This is the partial pressure of oxygen at sea level. To find the partial pressure of oxygen at a higher altitude, you would consider the decrease in total barometric pressure. At 447 mmHg, the partial pressure of oxygen would be around 80 mmHg. Summary: A: Incorrect because it is too low. B: Incorrect because it is too low. D: Incorrect because it is too high.