Nokea
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.
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The percent of oxygen saturation of hemoglobin when the temperature is 38 degrees centigrade is
- A. greater than the percent of oxygen saturation of hemoglobin when the temperature is 43 degrees centigrade
- B. less than the percent of oxygen saturation of hemoglobin when the temperature is 43 degrees centigrade
- C. equal to the percent of oxygen saturation of hemoglobin when the temperature is 43 degrees centigrade
- D. equal to the percent of oxygen saturation of hemoglobin when the temperature is 20 degrees centigrade
Correct Answer: A
Rationale: The correct answer is A because at higher temperatures, oxygen dissociation from hemoglobin increases, leading to lower oxygen saturation. This is due to the Bohr effect, where increased temperature shifts the hemoglobin-oxygen dissociation curve to the right. Therefore, the percent of oxygen saturation is greater at 38 degrees Celsius compared to 43 degrees Celsius.
Choice B is incorrect because higher temperatures decrease oxygen saturation. Choice C is incorrect as the saturation is not equal at different temperatures due to the Bohr effect. Choice D is incorrect because the saturation at 20 degrees Celsius would be higher than at 38 degrees Celsius.
What is heart failure?
- A. A sudden stoppage of the heart
- B. Inability of the heart to pump blood effectively
- C. Accumulation of excess cholesterol in the arteries
- D. Irregular heartbeat
Correct Answer: B
Rationale: The correct answer is B: Inability of the heart to pump blood effectively. Heart failure occurs when the heart is unable to pump blood efficiently to meet the body's needs. This can lead to symptoms such as shortness of breath, fatigue, and fluid retention.
Explanation:
1. Heart failure is a chronic condition that develops over time due to various factors such as high blood pressure, heart attacks, or heart muscle damage.
2. The inability of the heart to pump blood effectively results in reduced blood flow to the body's organs and tissues.
3. This can lead to a buildup of fluid in the lungs and other parts of the body, causing symptoms like shortness of breath and swelling.
4. A sudden stoppage of the heart (Choice A) would result in cardiac arrest, not heart failure.
5. Accumulation of excess cholesterol in the arteries (Choice C) refers to atherosclerosis, not heart failure.
6. An irregular heartbeat (Choice D) may be a symptom
In planning care for the patient with bronchiectasis, which nursing intervention should the nurse include?
- A. Relieve or reduce pain
- B. Prevent paroxysmal coughing
- C. Prevent spread of the disease to others
- D. Promote drainage and removal of mucus
Correct Answer: D
Rationale: In planning care for the patient with bronchiectasis, the nurse should include promoting drainage and removal of mucus to prevent further complications and improve respiratory function.
The clinic nurse is caring for a patient who has been diagnosed with emphysema and who has just had a pulmonary function test (PFT) ordered. The patient asks, 'What exactly is this test for?' What would be the nurse's best response?
- A. A PFT measures how much air moves in and out of your lungs when you breathe.
- B. A PFT measures how much energy you get from the oxygen you breathe.
- C. A PFT measures how elastic your lungs are.
- D. A PFT measures whether oxygen and carbon dioxide move between your lungs and your blood.
Correct Answer: A
Rationale: The correct answer is A because a pulmonary function test (PFT) measures lung function by assessing how much air moves in and out of the lungs when breathing. This test helps diagnose conditions like emphysema by evaluating lung capacity and air flow. Choice B is incorrect because PFTs do not measure energy obtained from oxygen, but rather focus on lung function. Choice C is incorrect as PFTs do not specifically measure lung elasticity. Choice D is incorrect because PFTs primarily assess air movement in the lungs, not the exchange of oxygen and carbon dioxide between the lungs and blood.
Partial pressure of carbon dioxide in the inspired and expired air respectively
- A. 0.3 and 40 mm Hg
- B. 0.3 and 32 mm Hg
- C. 40 and 46 mm Hg
- D. 40 and 0.3 mm Hg
Correct Answer: A
Rationale: The partial pressure of carbon dioxide in inspired air is around 0.3 mm Hg as it is very low in atmospheric air. During expiration, the partial pressure of carbon dioxide increases to around 40 mm Hg due to its exchange in the lungs. This makes option A the correct answer. Option B is incorrect because the partial pressure of CO2 in expired air is not 32 mm Hg. Option C is incorrect as 40 mm Hg is the partial pressure in expired air, not inspired air. Option D is incorrect because 0.3 mm Hg is the partial pressure in inspired air, not expired air.