Nokea
Regarding cough receptors:
- A. There is increased sensitivity in viral infections
- B. ~2-agonists decrease the sensitivity of cough receptors
- C. Exercise can stimulate the cough receptors in asthmatics
- D. They are predominantly seen in the large airways
Correct Answer: A
Rationale: Cough receptor sensitivity increases during viral infections, leading to heightened cough reflex.
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A child has been diagnosed with valvular disease following rheumatic fever (RF). During patient teaching, the nurse discusses the child's long-term prophylactic therapy with antibiotics for dental procedures, surgery, and childbirth. The parents indicate they understand when they say:
- A. She will need to take the antibiotics until she is 18 years old.
- B. She will need to take the antibiotics for 5 years after the last attack.
- C. She will need to take the antibiotics for 10 years after the last attack.
- D. She will need to take the antibiotics for the rest of her life.
Correct Answer: D
Rationale: Valvular involvement indicates significant damage; therefore, lifelong prophylactic antibiotics are required.
In normal neonates:
- A. Extracellular fluid volume exceeds intracellular fluid volume
- B. In a term baby, plasma calcium levels exceed that of the mother
- C. Clamping the umbilical cord after cessation of cord pulsations increases the blood volume by 20% in the baby
- D. There are two arteries and one vein in the umbilical cord
Correct Answer: A
Rationale: In neonates, extracellular fluid volume is greater than intracellular fluid volume, reflecting the transition from intrauterine to extrauterine life.
Causes of hypertension in a child include:
- A. Long-standing vesico-ureteric reflux
- B. Cushing's syndrome
- C. Addison's disease
- D. Turner's syndrome
Correct Answer: B
Rationale: Cushing's syndrome, characterized by excessive cortisol levels, is a known cause of secondary hypertension in children.
The following are causes of cyanosis in the presence of 60% oxygen:
- A. Haemoglobin concentration < 5 g%
- B. Methaemoglobinaemia
- C. Thalassaemia
- D. Right to left shunt
Correct Answer: D
Rationale: A right-to-left shunt can cause cyanosis even in the presence of high oxygen levels. Methaemoglobinaemia and severe anemia (Hb < 5 g%) can also cause cyanosis.
Sudden death in an athlete immediately after forceful blunt trauma to the chest is most likely
- A. commotio cordis
- B. myocardial infarction
- C. lacerated coronary artery
- D. ruptured cardiac tendineae
Correct Answer: A
Rationale: Commotio cordis occurs due to sudden arrhythmias triggered by chest trauma during a vulnerable phase of the cardiac cycle.