ATI RN
Exam Questions on Respiratory System Questions
Question 1 of 5
The movement of both oxygen and carbon dioxide in the body is accomplished by
Correct Answer: D
Rationale: The correct answer is D: diffusion. Oxygen and carbon dioxide move in and out of cells through simple diffusion, which is the passive movement of molecules from an area of high concentration to an area of low concentration. This process occurs due to the concentration gradient of these gases. Osmosis (Choice C) is the movement of water across a selectively permeable membrane, not gases like oxygen and carbon dioxide. Exocytosis and endocytosis (Choice A) involve the transport of larger molecules and particles in and out of cells, not gases. Bulk flow (Choice B) involves the movement of fluids in response to pressure differences, not the specific movement of oxygen and carbon dioxide molecules. Therefore, diffusion is the correct mechanism for the movement of oxygen and carbon dioxide in the body due to their small molecular size and the concentration gradient present.
Question 2 of 5
One of the following is a difference between pulmonary respiration of frog and human
Correct Answer: A
Rationale: The correct answer is A because in frogs, respiration is mainly driven by buccal pumping using their mouth cavity and floor of the mouth, while in humans, diaphragm and ribs play a crucial role in expanding and contracting the chest cavity for breathing. Choices B and C are incorrect as both frogs and humans have lungs as respiratory organs and respiration occurs due to a pressure gradient in both species. Choice D is incorrect as the difference lies in the involvement of the diaphragm and ribs in respiration.
Question 3 of 5
Oxygen dissociation curve of myoglobin is
Correct Answer: B
Rationale: The correct answer is B: Hyperbolic. Myoglobin exhibits a hyperbolic oxygen dissociation curve due to its high affinity for oxygen, allowing it to bind oxygen quickly and efficiently at low partial pressures. This curve represents a simple one-to-one binding relationship between myoglobin and oxygen. The other choices are incorrect because A (Hypobolic) does not accurately describe myoglobin's binding characteristics, C (Linear) is not representative of the typical oxygen binding behavior of myoglobin, and D (Sigmoid) is more characteristic of hemoglobin, which exhibits cooperative binding of oxygen.
Question 4 of 5
A nurse assesses a client's respiratory status. Which information is most important for the nurse to obtain?
Correct Answer: D
Rationale: The correct answer is D: Occupation and hobbies. This information is crucial as certain occupations or hobbies may expose the client to respiratory hazards, leading to potential respiratory issues. By assessing their occupation and hobbies, the nurse can identify any risks or triggers that could impact the client's respiratory status. A: Average daily fluid intake is important for overall health but not directly related to respiratory status assessment. B: Neck circumference may be relevant for assessing airway obstruction risk but is not as critical as occupation and hobbies. C: Height and weight are more related to general health and body mass index, not specifically respiratory status assessment.
Question 5 of 5
A home health nurse is visiting a new client who uses oxygen in the home. For which factors doesn't the nurse assess when determining if the client is using the oxygen safely?
Correct Answer: D
Rationale: The correct answer is D because household light bulbs being fluorescent type is unrelated to the safe use of oxygen. The nurse should assess factors directly related to oxygen safety, such as smoking restrictions, electrical cord condition, and proper storage of flammable materials. Fluorescent light bulbs do not pose a significant risk in relation to oxygen safety.