Nokea
The thumb is supplied by which dermatome
- A. C4
- B. C5
- C. C6
- D. C7
Correct Answer: C
Rationale: The C6 dermatome supplies the thumb and radial side of the hand. This is important in assessing cervical nerve root function.
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Which of the following is the causative agent of primary amoebic meningoencephalitis?
- A. Naegleria fowleri
- B. Entameba histolyticum
- C. Amoeba proteus
- D. Acanthamoeba polyphaga
Correct Answer: A
Rationale: The correct answer is A: Naegleria fowleri. This is because Naegleria fowleri is known to be the causative agent of primary amoebic meningoencephalitis, a rare but serious infection of the brain. This amoeba enters the body through the nasal passages and travels to the brain, causing inflammation and damage. Entameba histolyticum is a different species of amoeba that causes amoebiasis, a gut infection. Amoeba proteus is a harmless freshwater amoeba used in biology studies. Acanthamoeba polyphaga can cause infections in immunocompromised individuals but is not associated with primary amoebic meningoencephalitis.
What is the strongest known risk factor for MS?
- A. cigarette smoking
- B. genetics
- C. obesity
- D. living in northern climates
Correct Answer: B
Rationale: Genetics is the strongest known risk factor for multiple sclerosis (MS). While environmental factors like vitamin D deficiency and smoking can influence risk, having a family history of MS significantly increases an individual's likelihood of developing the condition.
During care of a patient in myasthenic crisis, maintenance of what is the nurse's first priority for the patient?
- A. Mobility
- B. Nutrition
- C. Respiratory function
- D. Verbal communication
Correct Answer: C
Rationale: Respiratory function is critical in myasthenic crisis
Which action requires immediate intervention by the nurse for a nursing assistant caring for a patient with CTS?
- A. Arrange the patient's lunch tray and cut the meat.
- B. Provide warm water and assist the patient with a bath.
- C. Replace the patient's splint in hyperextension position.
- D. Remind the patient not to lift very heavy objects.
Correct Answer: C
Rationale: Replacing a splint in hyperextension without proper training could exacerbate the condition.
The human lens:
- A. is innervated by the ophthalmic nerve
- B. has a uniform refractive index
- C. has a large radius of curvature anteriorly than posteriorly
- D. stops growing after birth
Correct Answer: C
Rationale: The human lens has a larger radius of curvature anteriorly than posteriorly, contributing to its optical properties. It is not innervated, does not have a uniform refractive index, and continues to grow throughout life.