ATI RN
Respiratory System Questions Questions
Question 1 of 5
Which of the following is NOT a function of the nasal cavities?
Correct Answer: D
Rationale: The correct answer is D: Oxygenate the blood. Nasal cavities are not directly involved in the process of oxygenating the blood. The main function of the nasal cavities is to filter dust out of incoming air, detect odors, and warm the air before it reaches the lungs. The blood is oxygenated in the lungs through the process of respiration, where oxygen from the air is absorbed into the bloodstream. Nasal cavities play a role in preparing the air for this process but do not directly oxygenate the blood.
Question 2 of 5
As blood enters the systemic capillaries
Correct Answer: B
Rationale: Step-by-step rationale: 1. Oxygen diffuses from areas of higher concentration to lower concentration. 2. Blood entering systemic capillaries is oxygen-rich. 3. Tissues have lower oxygen concentration. 4. Therefore, PO2 in the blood is higher than that in the tissues. Summary: Option B is correct as oxygen moves from blood to tissues due to the concentration gradient. Option A is incorrect as PO2 in blood is higher. Option C is incorrect due to the oxygen concentration difference. Option D is incorrect as the concentration gradient drives oxygen diffusion.
Question 3 of 5
Expiratory muscles contract at the time of
Correct Answer: C
Rationale: The correct answer is C: Forceful expiration. During forceful expiration, expiratory muscles such as the internal intercostals and abdominal muscles contract to increase the force of exhalation. This helps in pushing air out of the lungs more effectively. In contrast, during normal expiration (choice D), the expiratory muscles are not significantly engaged as the process is passive. Choices A and B are incorrect because deep inspiration and normal inspiration do not involve the contraction of expiratory muscles.
Question 4 of 5
Which of the following gases makes the most stable combination with the haemoglobin of red blood cells
Correct Answer: B
Rationale: The correct answer is B: CO. Carbon monoxide (CO) forms a stable combination with hemoglobin, known as carboxyhemoglobin. This is because CO has a higher affinity for hemoglobin than oxygen (choice C), leading to the formation of a stable bond. Choice A (CO2) forms a reversible combination with hemoglobin, while choice D (N) does not bind significantly to hemoglobin. Hence, B is the most stable combination due to CO's strong bond with hemoglobin.
Question 5 of 5
A client has a tracheostomy that is 3 days old. Upon assessment the nurse notes that the client's face is puffy and the eyelids are swollen. What action by the nurse takes best?
Correct Answer: A
Rationale: The correct answer is A: Assess the client's oxygen saturation. Puffy face and swollen eyelids could indicate a potential airway obstruction or compromised oxygenation. Assessing oxygen saturation will help determine if the client is adequately oxygenated. If oxygen saturation is low, immediate intervention may be needed. Choice B: Notifying the Rapid Response Team is premature without confirming the client's oxygen status first. Choice C: Oxygenating with a bag-valve-mask assumes the issue is solely related to oxygenation, which may not be the case. Choice D: Palpating the skin of the upper chest does not directly address the potential respiratory issue indicated by the client's presentation.