Nursing Elites

1. Which structure in the brain regulates sleep and wakefulness?

• A. Hypothalamus
• B. Thalamus
• C. Pineal gland
• D. Cerebellum

Correct answer: C

Rationale: The pineal gland, located in the brain, is responsible for regulating sleep and wakefulness by secreting the hormone melatonin. Melatonin plays a crucial role in controlling the sleep-wake cycle, with higher levels at night inducing sleepiness. The hypothalamus (Choice A) regulates various physiological processes but is not primarily responsible for sleep-wake cycles. The thalamus (Choice B) is involved in relaying sensory information but not specifically in regulating sleep. The cerebellum (Choice D) plays a role in coordination and motor control rather than sleep regulation.

2. Select the meaning of the underlined word in the following sentence. The chemicals in plastic containers may be deleterious to children’s health.

• A. Harmful
• B. Deleting
• C. Delightful
• D. Inoffensive

Correct answer: A

Rationale: The word 'deleterious' means causing harm or damage. In this context, the sentence implies that the chemicals in plastic containers can be harmful to children's health. Therefore, the correct meaning of the underlined word is 'harmful,' making option A the most suitable choice. Option B 'Deleting' is incorrect because it refers to removing or erasing, which does not fit the context. Option C 'Delightful' is incorrect as it means causing great pleasure or delight, the opposite of the intended meaning. Option D 'Inoffensive' is incorrect as it means not causing any harm or annoyance, which is contrary to the negative impact described in the sentence.

3. A remedy may cure certain ailments. Another word for this might be ___________.

• A. inoculation
• B. indicator
• C. nostrum
• D. serum

Correct answer: C

Rationale: A "nostrum" is a term used to describe a questionable or untested remedy or medication that claims to cure ailments. In this context, as a remedy is suggested to cure certain ailments, "nostrum" fits best in providing an alternative word that aligns with the situation. The other choices are not synonyms for a remedy that cures ailments. 'Inoculation' refers to the introduction of a vaccine, 'indicator' is something that provides information or signals, and 'serum' is a component of blood or a medication, none of which directly align with the concept of a remedy curing ailments.

4. Which muscle group is primarily responsible for extending the knee?

• A. Hamstrings
• B. Quadriceps
• C. Calves
• D. Glutes

Correct answer: B

Rationale: The quadriceps, a group of muscles located on the front of the thigh, are primarily responsible for extending the knee joint. When the quadriceps contract, they work to straighten the knee, allowing for actions like kicking or standing up from a seated position. The hamstrings (Choice A) are responsible for flexing the knee, the calves (Choice C) primarily work on plantar flexion at the ankle joint, and the glutes (Choice D) are mainly involved in hip extension.

5. Select the word that makes this sentence grammatically correct. We had been working _______ nine hours.

• A. since
• B. near
• C. for
• D. in

Correct answer: C

Rationale: The correct preposition to use in this sentence is 'for.' The sentence should read: 'We had been working for nine hours.' This preposition is used to indicate the duration of time something has been happening. Choice A ('since') is incorrect because it is used to indicate a specific point in time when an action started. Choice B ('near') is incorrect as it does not convey the intended meaning of the sentence. Choice D ('in') is incorrect as it does not appropriately indicate the duration of time the action has been taking place.

Similar Questions