ATI RN
Exam Questions on Respiratory System Questions
Question 1 of 5
Inhibition of medulla oblongata chemoreceptors and respiratory muscles has what effect on respiratory rate, elimination of CO2 at alveoli, and arterial PCO2?
Correct Answer: D
Rationale: The correct answer is D. Inhibition of medulla oblongata chemoreceptors and respiratory muscles would decrease respiratory rate, leading to decreased elimination of CO2 at alveoli. This would cause an increase in arterial PCO2 due to less CO2 being removed from the body. Therefore, choice D is correct. Choices A, B, and C are incorrect because they do not align with the physiological effects of inhibiting the medulla oblongata chemoreceptors and respiratory muscles. Option A suggests an increase in respiratory rate and elimination of CO2, which goes against the expected decrease in these parameters. Option B proposes an increase in respiratory rate but a decrease in CO2 elimination and arterial PCO2, which is inconsistent with the expected outcomes. Option C suggests an increase in respiratory rate and CO2 elimination but a decrease in arterial PCO2, which does not follow the logic of the question.
Question 2 of 5
The most important factor in determining the percent of oxygen saturation of hemoglobin
Correct Answer: A
Rationale: The correct answer is A: The partial pressure of O2. Oxygen saturation of hemoglobin is directly related to the partial pressure of oxygen in the blood. As the partial pressure of O2 increases, more oxygen binds to hemoglobin, leading to higher oxygen saturation. Acidity (choice B) and the partial pressure of CO2 (choice C) can influence the oxygen-hemoglobin dissociation curve, but they are not the primary factors determining oxygen saturation. Choice D is incomplete and not relevant to the question.
Question 3 of 5
The 75-year-old patient asks the nurse if the Pneumovax immunization he took when he was 65 is still protecting him. Which reply is most accurate?
Correct Answer: D
Rationale: Step 1: Pneumovax is recommended for adults aged 65 and older. Step 2: Immunity from Pneumovax decreases over time. Step 3: CDC recommends a second dose of Pneumovax after 5 years for those at highest risk. Step 4: Answer D is correct as it aligns with CDC guidelines for revaccination. Step 5: Other choices are incorrect as they do not reflect current recommendations or scientific evidence.
Question 4 of 5
Which class of drugs often inhibits carbonic anhydrase and is used for certain medical conditions?
Correct Answer: C
Rationale: The correct answer is C: Carbonic anhydrase inhibitors. These drugs inhibit the enzyme carbonic anhydrase, which plays a role in various physiological processes. They are used to treat conditions such as glaucoma, epilepsy, and altitude sickness. Antibiotics (A) target bacterial infections, antihistamines (B) relieve allergy symptoms, and antidepressants (D) treat depression, making them unrelated to carbonic anhydrase inhibition.
Question 5 of 5
The patient with angina is admitted to the hospital. The patient states "I might as well have died because now I won't be able to do anything." Your best response is
Correct Answer: A
Rationale: The correct answer is A because it demonstrates active listening and empathy, allowing the patient to express their feelings. By asking for clarification, it shows interest in the patient's concerns and opens up a dialogue for further exploration. This approach can help the patient feel heard and supported, leading to better understanding and communication. Choices B, C, and D are incorrect because they do not directly address the patient's statement or feelings. B dismisses the patient's concerns, C invalidates their emotions, and D offers a general statement without acknowledging the patient's specific worries. These responses may lead to the patient feeling unheard or misunderstood, hindering effective communication and rapport building.