ATI RN
Respiratory System Practice Questions Questions
Question 1 of 5
The theophylline blood level is 13 mcg/mL. Which intervention is the most appropriate in light of this finding?
Correct Answer: A
Rationale: The correct answer is A because the theophylline blood level of 13 mcg/mL is within the therapeutic range (10-20 mcg/mL). Therefore, the next dose should be administered as ordered to maintain therapeutic levels. Choice B is incorrect as skipping doses can lead to subtherapeutic levels. Choice C is unnecessary as the level is within range. Choice D is irrelevant to the theophylline level.
Question 2 of 5
The rate and depth of breathing are governed by
Correct Answer: D
Rationale: The correct answer is D because the rate and depth of breathing are controlled by a respiratory center in the brainstem, which includes the medulla and pons. The medulla regulates the basic rhythm of breathing, while the pons helps adjust the rate and depth based on input from chemoreceptors and other factors. Choice A is incorrect because chemoreceptors in arterial walls primarily detect changes in blood pH and CO2 levels, not directly control breathing. Choice B is incorrect as baroreceptors in the diaphragm are more related to detecting stretch and pressure changes, not regulating breathing. Choice C is incorrect as the partial pressure of O2 in the atmosphere does not directly control breathing but rather influences oxygen exchange in the lungs.
Question 3 of 5
Glottis is opening in the floor of
Correct Answer: B
Rationale: The correct answer is B, Bucco-pharyngeal cavity. The glottis is the opening between the vocal cords in the larynx, which is located in the upper part of the respiratory tract. The bucco-pharyngeal cavity is the part of the oral cavity that leads to the pharynx, where the glottis is situated. The diaphragm is a muscle separating the thoracic and abdominal cavities, and the trachea is a tube connecting the larynx to the bronchi. Therefore, the glottis is not located in the diaphragm or trachea.
Question 4 of 5
In human beings, CO2 concentration in the inspired and expired air is respectively
Correct Answer: D
Rationale: The correct answer is D (0.03% and 4.0%). The inspired air contains approximately 0.03% CO2, as the atmosphere has a low CO2 concentration. During expiration, the CO2 concentration in the air increases due to the removal of oxygen and the addition of CO2 from cellular respiration, resulting in an average of around 4.0% CO2 in expired air. Choices A, B, and C are incorrect because they do not accurately reflect the typical CO2 concentrations in inspired and expired air in human beings.
Question 5 of 5
A nurse obtains the health history of a client who is recently diagnosed with lung cancer and identifies that the client has a 60–pack-year smoking history. Which action is most important for the nurse to take when interviewing this client?
Correct Answer: C
Rationale: The correct answer is C: Maintain a nonjudgmental attitude to avoid causing the client to feel guilty. This is important because the nurse needs to establish trust with the client to obtain accurate information about their health history. Being nonjudgmental creates a safe space for the client to share openly, which is crucial for effective assessment and planning of care. Choice A is incorrect because while it is important for the client to quit smoking, addressing this issue at the first encounter may not be the most effective approach and could potentially alienate the client. Choice B is also incorrect as the focus should be on building rapport and obtaining accurate information relevant to the client's current health status. Encouraging honesty about substance use is important but not the most critical action in this context. Choice D is incorrect as the nurse should provide information and support to the client based on the client's needs and wishes, rather than making assumptions about their preferences or prognosis.