ATI RN
Multiple Choice Questions and Answers on Respiratory System Questions
Question 1 of 5
Regarding oxygen transport
Correct Answer: B
Rationale: The correct answer is B: 1 gram of pure Hb can combine with 1.34 - 1.39 ml of oxygen. This is correct because each gram of hemoglobin can bind with approximately 1.34 - 1.39 ml of oxygen, facilitating efficient oxygen transport in the blood. A is incorrect because while a small amount of oxygen is transported as dissolved oxygen, the majority is transported bound to hemoglobin. C is incorrect because arterial pO2 reflects the oxygen content in the blood, not just the hemoglobin levels. D is incorrect because CO2 is actually 20 times more soluble than oxygen, not 200 times.
Question 2 of 5
Which phrase is used to describe the volume of air inspired and expired with a normal breath?
Correct Answer: C
Rationale: The correct answer is C: Tidal volume. Tidal volume refers to the volume of air inspired and expired during a normal breath. It represents the amount of air moved into or out of the lungs during each respiratory cycle, which typically ranges from 500 to 700 milliliters in adults. Total lung capacity (A) is the maximum volume of air the lungs can hold, including residual volume. Forced vital capacity (B) is the maximum amount of air that can be forcefully exhaled after a maximum inhalation, not related to a normal breath. Residual volume (D) is the volume of air remaining in the lungs after a maximal exhalation and is not part of a normal breath cycle.
Question 3 of 5
A nurse is instructing a hospitalized client with a diagnosis of emphysema about measures that will enhance the effectiveness of breathing during dyspneic periods. Which of the following positions will the nurse instruct the client to assume?
Correct Answer: D
Rationale: The correct answer is D, sitting on the side of the bed and leaning on an overbed table. This position promotes maximum expansion of the thorax, allowing for improved lung ventilation. Leaning forward helps reduce the work of breathing and facilitates better airflow. Options A and C do not provide the same level of thoracic expansion and may not be as effective. Option B may not provide the necessary support for the client to lean forward and optimize breathing.
Question 4 of 5
The client with which of the following types of lung cancer metastasizes quickly?
Correct Answer: B
Rationale: The correct answer is B: Oat cell. Oat cell (small cell) lung cancer metastasizes quickly due to its aggressive nature, high growth rate, and early dissemination to distant sites. This type of cancer is known for its rapid spread to other organs, leading to poor prognosis. Adenocarcinoma, squamous cell, and bronchial carcinoids have a slower metastatic rate compared to oat cell lung cancer. Adenocarcinoma tends to metastasize to the lymph nodes and other organs over time, while squamous cell typically spreads locally within the lung tissue. Bronchial carcinoids are slow-growing tumors with a lower propensity for rapid metastasis compared to oat cell lung cancer.
Question 5 of 5
Exchange across a membrane requires
Correct Answer: D
Rationale: Exchange across a membrane involves the movement of molecules or ions. Moisture (A) helps facilitate this movement by dissolving solutes. Transport proteins (B) are essential for facilitating the movement of specific molecules across the membrane. Pressure gradients (C) can drive the movement of substances across the membrane. Therefore, the correct answer is D, as all these factors play a crucial role in facilitating exchange across a membrane. Moisture alone is not sufficient for exchange, transport proteins are necessary for specific molecule transport, and pressure gradients can aid in driving the movement of substances.