Nokea
The following are true about corneal sensation:
- A. the sensation is greatest at the apex and diminishes towards the limbus
- B. the temporal half of the cornea is more sensitive than the nasal half
- C. the Bonnet-Cochet aesthesiometer gives quantitative measure of the degree of hypoaesthesia
- D. all above
Correct Answer: D
Rationale: Corneal sensation is greatest at the apex, the temporal half is more sensitive, and the Bonnet-Cochet aesthesiometer quantifies hypoaesthesia. All statements are true.
You may also like to solve these questions
With regards to the spinal cord blood supply
- A. There are two anterior spinal arteries
- B. The anterior spinal artery arises form the vertebral artery
- C. The posterior spinal artery is singular
- D. The posterior spinal artery arises from the posterior superior cerebellar
Correct Answer: B
Rationale: The anterior spinal artery arises from the vertebral artery and supplies the anterior two-thirds of the spinal cord. The posterior spinal arteries are paired and supply the posterior third.
Which of these diseases results in meningitis caused by an encapsulated yeast?
- A. cryptococcosis
- B. histoplasmosis
- C. candidiasis
- D. coccidiomycosis
Correct Answer: A
Rationale: The correct answer is A: cryptococcosis. The encapsulated yeast causing meningitis in this disease is Cryptococcus neoformans. This yeast has a unique capsule that allows it to evade the host immune system, leading to meningitis. Histoplasmosis (B) is caused by Histoplasma capsulatum, which is not encapsulated. Candidiasis (C) is caused by Candida species, which are not encapsulated yeasts. Coccidiomycosis (D) is caused by Coccidioides species, which are dimorphic fungi and not encapsulated yeasts.
The part of the brain responsible for unconscious bodily functions is the:
- A. cerebrum.
- B. cerebellum.
- C. brain stem.
- D. cranial nerves.
Correct Answer: C
Rationale: The brain stem is responsible for regulating unconscious bodily functions, such as breathing, heart rate, and blood pressure. It includes structures like the medulla oblongata, pons, and midbrain. These areas control vital processes necessary for survival and maintain homeostasis. The brain stem also serves as a pathway for nerve signals traveling between the brain and the rest of the body, making it essential for basic life functions.
What should the nurse explain about levodopa?
- A. It stimulates dopamine receptors in the basal ganglia.
- B. It promotes the release of dopamine from brain neurons.
- C. It is a precursor of dopamine that is converted to dopamine in the brain.
- D. It prevents the excessive breakdown of dopamine in the peripheral tissues.
Correct Answer: C
Rationale: Levodopa is a precursor of dopamine that crosses the blood-brain barrier
Which of the following nursing interventions should be done in the case of a client who has a head injury obtained from being thrown off of a motorcycle?
- A. Assess LOC every hour or more often if needed
- B. Put the code cart outside the client's room
- C. Keep the client quiet in bed
- D. Allow one visitor at a time
Correct Answer: A
Rationale: Frequent assessments of LOC are critical to detect worsening neurological status.