Nokea
which of the following is a chronic respiratory disorder caused by smoking?
- A. asthma
- B. emphysema
- C. respiratory alkalosis
- D. Acidosis
Correct Answer: B
Rationale: Emphysema is the correct answer because it is a chronic respiratory disorder specifically caused by smoking. Smoking damages the air sacs in the lungs, leading to shortness of breath and difficulty breathing. Asthma is a separate condition involving airway inflammation. Respiratory alkalosis and acidosis refer to imbalances in blood pH levels, not directly caused by smoking.
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Nurse Maureen has assisted a physician with the insertion of a chest tube. The nurse monitors the client and notes fluctuation of the fluid level in the water seal chamber after the tube is inserted. Based on this assessment, which action would be appropriate?
- A. Inform the physician.
- B. Continue to monitor the client.
- C. Reinforce the occlusive dressing.
- D. Encourage the client to deep breathe.
Correct Answer: B
Rationale: The correct answer is B: Continue to monitor the client. Fluctuation of fluid level in the water seal chamber post chest tube insertion indicates proper functioning of the chest tube system. This signifies that the tube is effectively draining fluid or air from the pleural space. It is essential to continue monitoring the client to ensure ongoing proper functioning of the chest tube. Informing the physician (Choice A) is not necessary at this point unless there are other concerning symptoms. Reinforcing the occlusive dressing (Choice C) is not indicated unless there is a leak or issue with the dressing. Encouraging the client to deep breathe (Choice D) is unrelated to the assessment of the chest tube system.
Client history and assessment reveals all of these findings. Which finding supports the diagnosis of PE?
- A. Client was recently in a motor vehicle accident.
- B. Client participated in an aerobic exercise program for 6 months.
- C. Client gave birth to youngest child 1 year ago.
- D. Client was on bedrest 6 hours after diagnostic procedure.
Correct Answer: A
Rationale: The correct answer is A. Recent trauma or immobility due to a motor vehicle accident increases the risk of PE. Aerobic exercise (B), childbirth over a year ago (C), and brief bedrest (D) are less likely risk factors.
Which of the following lymphocytes are involved in innate immunity?
- A. natural killer (NK) cells
- B. plasma cells
- C. CD8 T cells
- D. B memory cells
Correct Answer: A
Rationale: Natural killer (NK) cells are involved in innate immunity as they are able to directly kill virus-infected cells and tumor cells without prior sensitization. They are part of the body's first line of defense against infections. Plasma cells, CD8 T cells, and B memory cells are all part of adaptive immunity, which involves a specific response to pathogens and requires prior exposure. Therefore, they are not involved in innate immunity.
In human beings, rib case and sternum move upwardly and outwardly during
- A. Exercise
- B. Sudden back injury
- C. Expiration
- D. Inspiration
Correct Answer: D
Rationale: During inspiration, the diaphragm contracts and moves downward, while the intercostal muscles contract to lift the rib cage and sternum upward and outward to increase lung volume for air intake. This creates a negative pressure in the lungs, allowing air to be drawn in. In contrast, expiration involves relaxation of the diaphragm and intercostal muscles, leading to the rib cage and sternum moving downward and inward to expel air. Therefore, the correct answer is D: Inspiration. Choices A, B, and C are incorrect as they do not specifically involve the physiological process of rib cage and sternum movement related to breathing.
Double Bohr effect (Oxygen curves for maternal and foetal Hb move apart in opposite directions) occurs in
- A. Foetal circulation
- B. Maternal circulation
- C. In the Placenta operating in both maternal and foetal circulations
- D. In the uterine wall
Correct Answer: C
Rationale: Rationale:
1. In the placenta, maternal and fetal blood circulations are in close proximity.
2. Maternal Hb releases oxygen to fetal Hb due to the lower affinity of fetal Hb for oxygen.
3. This double Bohr effect causes the oxygen dissociation curves of maternal and fetal Hb to move apart.
4. This occurs specifically in the placenta where both maternal and fetal circulations operate.
Summary:
A. Incorrect. Double Bohr effect doesn't occur solely in fetal circulation.
B. Incorrect. Double Bohr effect doesn't occur solely in maternal circulation.
C. Correct. Placenta facilitates the exchange between maternal and fetal blood causing the double Bohr effect.
D. Incorrect. Double Bohr effect is not related to the uterine wall.