Nokea
Regarding malaria:
- A. Plasmodium ovale has an exoerythrocytic cycle
- B. Plasmodium malariae does not occur after 5 years of primary illness
- C. Chloroquine is useful for prophylaxis of falciparum malaria in all areas of the world
- D. Primaquine is used to eradicate falciparum malaria
Correct Answer: A
Rationale: Plasmodium ovale has both an exoerythrocytic (liver) and erythrocytic (blood) cycle, which is a characteristic of this species of malaria parasite.
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Causes of uveitis include:
- A. Diabetes
- B. Behçet's disease
- C. Ankylosing spondylitis
- D. Rheumatic fever
Correct Answer: B
Rationale: Behçet's disease, a systemic vasculitis, is a known cause of uveitis, an inflammation of the uvea in the eye.
In Wilson's disease:
- A. There is an association with high caeruloplasmin levels
- B. Hepatic copper deposition is pathognomonic
- C. There is increased urinary excretion of copper
- D. There are copper deposits on the cornea
Correct Answer: D
Rationale: Copper deposits on the cornea (Kayser-Fleischer rings) are a hallmark of Wilson's disease, a genetic disorder leading to copper accumulation in tissues.
What does the nurse explain that a ventricular septal defect will allow?
- A. Blood to shunt left to right, causing increased pulmonary flow and no cyanosis
- B. Blood to shunt right to left, causing decreased pulmonary flow and cyanosis
- C. No shunting because of high pressure in the left ventricle
- D. Increased pressure in the left atrium, impeding circulation of oxygenated blood in the circulating volume
Correct Answer: A
Rationale: Pulmonary blood flow is increased when a ventricular septal defect exists. The blood shifts from left to right because of the higher pressure in the left ventricle. This particular shift does not cause cyanosis.
Avascular necrosis of the femoral head is associated with:
- A. Sickle cell trait
- B. Nephrotic syndrome
- C. Cushing's syndrome
- D. Hypothyroidism
Correct Answer: C
Rationale: Cushing's syndrome is associated with avascular necrosis due to steroid use. Sickle cell trait, nephrotic syndrome, and hypothyroidism are not directly linked.
Hypothalamic nuclei are responsible for:
- A. Control of hunger
- B. Temperature control
- C. Maintaining osmolarity of extracellular fluid
- D. Secretion of thyrotrophin
Correct Answer: A
Rationale: The hypothalamus plays a key role in regulating hunger through various nuclei and hormonal signals.