Nokea
Which statement is NOT true?
- A. Carbon dioxide is more soluble in fluid than in oxygen.
- B. Carbon dioxide diffuses more rapidly across the respiratory surface than does oxygen.
- C. The major muscle involved in breathing is the diaphragm.
- D. Oxygen is carried primarily by blood plasma
Correct Answer: D
Rationale: The correct answer is D. Oxygen is primarily carried by hemoglobin in red blood cells, not blood plasma. Hemoglobin binds to oxygen, forming oxyhemoglobin for transport. Option A is false because oxygen is more soluble in fluid than carbon dioxide. Option B is incorrect as oxygen diffuses slower than carbon dioxide due to its larger molecular size. Option C is true as the diaphragm is the main muscle involved in breathing, contracting to expand the lungs during inhalation.
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Each of the following is true regarding the spleen, except:
- A. Spleen is located posterolateral to the stomach, and contacts the diaphragm and left kidney.
- B. Splenic veins, arteries, and lymphatic vessels communicate with the spleen at the hilum.
- C. The spleen is a primary lymphoid organ, serving to filter lymph fluid.
- D. Lymphocytes and dendritic cells are concentrated in the white pulp.
Correct Answer: C
Rationale: Rationale:
C is correct because the spleen is a secondary lymphoid organ, not a primary one. The spleen filters blood, not lymph fluid.
A is correct as the spleen is located in the described position.
B is correct as the splenic vessels do communicate with the spleen at the hilum.
D is correct as lymphocytes and dendritic cells are indeed concentrated in the white pulp.
Summary:
A, B, and D are correct statements about the spleen. C is incorrect because the spleen is a secondary lymphoid organ, not a primary one.
Henry's law states that
- A. gas volume and temperature are directly proportional
- B. gas volume and pressure are inversely proportional
- C. the volume of gas that will dissolve in a solvent is proportional to the solubility of the gas and the gas pressure
- D. in a mixture of gases such as air
Correct Answer: C
Rationale: Henry's law states that the volume of gas dissolved in a solvent is directly proportional to the partial pressure of the gas above the solvent. This means that as the gas pressure increases, more gas will dissolve in the solvent. Choice C correctly describes this relationship between gas pressure and gas solubility in a solvent. Choices A and B are not related to Henry's law. Choice D is incomplete and does not provide any relevant information about Henry's law.
The lungs are covered by a two-layer membrane called the:
- A. pleura.
- B. diaphragm.
- C. respiratory membrane.
- D. intercostal muscles.
Correct Answer: A
Rationale: The correct answer is A: pleura. The pleura is a two-layered membrane that covers the lungs. The outer layer is called the parietal pleura, which lines the chest wall, and the inner layer is called the visceral pleura, which covers the lungs themselves. This double-layered structure helps to protect and cushion the lungs during breathing movements.
Summary of incorrect choices:
B: The diaphragm is a dome-shaped muscle located below the lungs that plays a role in breathing but does not cover the lungs.
C: The respiratory membrane refers to the interface where gas exchange occurs in the alveoli, not the covering of the lungs.
D: The intercostal muscles are located between the ribs and assist in breathing but do not cover the lungs.
In assessing for major sources of infection in a COPD patient, the nurse focuses on:
- A. Stasis of respiratory secretions.
- B. Low body weight.
- C. Episodes of postural hypotension.
- D. Delayed antigen-antibody response.
Correct Answer: A
Rationale: The correct answer is A: Stasis of respiratory secretions. In COPD patients, stasis of respiratory secretions can lead to bacterial growth and increase the risk of infections like pneumonia. This is a common issue in COPD due to impaired mucociliary clearance. Choices B, C, and D are not directly related to sources of infection in COPD patients. Low body weight is more associated with malnutrition, postural hypotension with cardiovascular issues, and delayed antigen-antibody response with immune system deficiencies.
When caring for a patient with acquired immune deficiency syndrome (AIDS)
- A. the nurse is aware that this patient is most at risk for developing which type of pneumonia?
- B. Hypostatic
- C. Streptococcus pneumoniae
- D. Atypical
Correct Answer: D
Rationale: The correct answer is D: Atypical pneumonia. Patients with AIDS are most susceptible to atypical pneumonia caused by organisms like Pneumocystis jiroveci. This is due to their weakened immune system. Hypostatic pneumonia is typically seen in bedridden patients, not specific to AIDS. Streptococcus pneumoniae is a common cause of community-acquired pneumonia but not particularly associated with AIDS. Therefore, the correct choice is D, as it aligns with the specific risk profile of AIDS patients for atypical pneumonia.