Multiple Choice Questions About Respiratory System

Multiple Choice Questions About Respiratory System Related

Review Multiple Choice Questions About Respiratory System related questions and content

A medical patient rings her call bell and expresses alarm to the nurse, stating, 'I've just coughed up this blood. That can't be good, can it?' How can the nurse best determine whether the source of the blood was the patient's lungs?

  • A. Obtain a sample and test the pH of the blood, if possible.
  • B. Try to see if the blood is frothy or mixed with mucus.
  • C. Perform oral suctioning to see if blood is obtained.
  • D. Swab the back of the patient's throat to see if blood is present.
Correct Answer: B

Rationale: The correct answer is B: Try to see if the blood is frothy or mixed with mucus. By observing if the blood is frothy or mixed with mucus, the nurse can determine if the source is more likely to be from the lungs, as blood from the lungs is often frothy due to air mixing with it during coughing. This observation helps differentiate between blood coming from the respiratory tract versus other sources in the body.

Incorrect choices:
A: Testing the pH of the blood does not directly indicate the source of the blood in this context.
C: Performing oral suctioning may not provide accurate information about the source of the blood.
D: Swabbing the back of the throat may not help determine if the blood is coming from the lungs as it could be from other sources in the upper respiratory tract.

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Bohr effect shifts the O2 Hb dissociation curve to right

  • A. To promote oxygenation of Hb in lungs
  • B. To increase O2 concentration
  • C. To decrease CO2 concentration
  • D. To decrease the pH of blood
Correct Answer: D

Rationale: The Bohr effect states that a decrease in pH shifts the oxygen-hemoglobin dissociation curve to the right, promoting the release of oxygen to tissues. This occurs in metabolically active tissues where CO2 is produced, lowering the pH. Choice D is correct because a decrease in blood pH facilitates oxygen unloading. Choices A and B are incorrect because the Bohr effect is related to oxygen release, not uptake. Choice C is incorrect because decreasing CO2 concentration would actually shift the curve to the left.

Pulmonary ventilation also called

  • A. inhalation
  • B. exhalation
  • C. Breathing
  • D. all of these
Correct Answer: C

Rationale: The correct answer is C: Breathing. Pulmonary ventilation refers to the process of breathing, which involves both inhalation and exhalation. Inhalation is the act of taking in air, while exhalation is the act of expelling air. Therefore, the term "pulmonary ventilation" encompasses both inhalation and exhalation, making choice C the correct answer. Choices A and B are incorrect because they only represent one part of the breathing process. Choice D is incorrect because it suggests that all choices are correct, which is not accurate in this context.

For the surface of an animal to function in the integumentary exchange of gases it must

  • A. be thin and soft.
  • B. have a high number of blood vessels
  • C. have mucus or moist covering
  • D. all of the above
Correct Answer: D

Rationale: The correct answer is D because for the integumentary exchange of gases to occur efficiently, the surface of the animal must meet all three criteria: be thin and soft to allow gases to pass through easily, have a high number of blood vessels to facilitate gas exchange, and have a mucus or moist covering to prevent desiccation and aid in gas diffusion. If the surface is not thin and soft, gases cannot diffuse effectively. Without a high number of blood vessels, there wouldn't be sufficient transport of gases to and from the surface. And without a mucus or moist covering, the surface may dry out, hindering gas exchange. Therefore, all of the above factors are essential for the integumentary exchange of gases to function optimally.

Carbon monoxide

  • A. has a very low affinity or attraction to hemoglobin.
  • B. is unlikely to be transported by the circulatory system.
  • C. is not the cause of death of people who breathe excessive amounts of automobile exhausts.
  • D. can arise from cigarette smoke
Correct Answer: D

Rationale: The correct answer is D because carbon monoxide can indeed arise from cigarette smoke due to incomplete combustion of tobacco. This is supported by scientific evidence. Carbon monoxide has a high affinity for hemoglobin, so choice A is incorrect. It can be transported by the circulatory system, making choice B incorrect. Breathing excessive amounts of automobile exhaust containing carbon monoxide can lead to death, making choice C incorrect.

A nurse has educated a client on isoniazid. What statement by the client indicates that teaching has been effective?

  • A. I need to take extra vitamin C while on isoniazid.
  • B. I should take this medicine with milk or juice.
  • C. I will take this medication on an empty stomach.
  • D. My contact lenses will be permanently stained.
Correct Answer: C

Rationale: The correct answer is C: "I will take this medication on an empty stomach." This indicates effective teaching because isoniazid should be taken on an empty stomach to maximize absorption. Taking it with food can reduce absorption.

A: Taking extra vitamin C is not necessary for isoniazid.
B: Taking isoniazid with milk or juice can reduce its effectiveness.
D: Contact lenses are not affected by isoniazid, so they will not be permanently stained.

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