Nursing Elites

1. Which of the following is responsible for generating the electrical impulses that regulate the heartbeat?

• A. Aorta
• B. Pulmonary veins
• C. Coronary arteries
• D. Sinoatrial (SA) node

Correct answer: D

Rationale: The Sinoatrial (SA) node is responsible for generating the electrical impulses that regulate the heartbeat. It is often referred to as the heart's natural pacemaker because it initiates the electrical signals that coordinate the heart's contractions. The other options listed (Aorta, Pulmonary veins, Coronary arteries) do not play a direct role in generating the electrical impulses for the heartbeat. The Aorta is a large artery that carries oxygen-rich blood away from the heart, the Pulmonary veins carry oxygen-rich blood from the lungs to the heart, and the Coronary arteries supply blood to the heart muscle itself, but none of them are involved in generating the electrical impulses that regulate the heartbeat.

2. What can one reasonably conclude from the final comment of this passage? "If he be Mr. Hyde," he had thought, "I should be Mr. Seek."

• A. The speaker is considering a name change.
• B. The speaker is experiencing an identity crisis.
• C. The speaker has mistakenly been looking for the wrong person.
• D. The speaker intends to continue to look for Hyde.

Correct answer: D

Rationale: The speaker's final comment implies that if the person is indeed Mr. Hyde, then the speaker would assume the role of Mr. Seek, indicating a determination to continue searching for Hyde. This suggests that the speaker intends to persist in their search for Hyde rather than giving up or changing direction. Choices A, B, and C are incorrect because there is no indication in the passage that the speaker is considering a name change, experiencing an identity crisis, or mistakenly looking for the wrong person. The focus is on the speaker's resolve to find Mr. Hyde.

3. Which type of glial cell provides structural support and insulation for neurons in the central nervous system?

• A. Schwann cells
• B. Astrocytes
• C. Oligodendrocytes
• D. Microglia

Correct answer: C

Rationale: Oligodendrocytes are a type of glial cell that provides structural support and insulation for neurons in the central nervous system by forming myelin sheaths around axons. Schwann cells (option A) perform a similar function but in the peripheral nervous system. Astrocytes (option B) are involved in providing nutrients to neurons, maintaining the chemical environment, and repairing damage. Microglia (option D) are primarily responsible for immune defense in the central nervous system, not for providing structural support and insulation for neurons.

4. Which state of matter has a definite shape and volume but can flow?

• A. Solid
• B. Liquid
• C. Gas
• D. Plasma

Correct answer: B

Rationale: A liquid is the state of matter that has a definite volume but can flow and take the shape of its container. Solids have a definite shape and volume but do not flow as liquids do. Gases do not have a definite shape or volume but can flow to fill their container. Plasma is a state of matter where the particles are highly energized and do not have a definite shape or volume, thus not fitting the description of having a definite shape and volume while being able to flow.

5. Which of the following best describes the author’s purpose?

• A. The author wants to tell customers about the cars available at Carl’s Car Depot.
• B. The author wants to encourage other car dealerships to lower their prices.
• C. The author wants to provide new and used cars at affordable prices.
• D. The author wants to attract customers to Carl’s Car Depot.

Correct answer: D

Rationale: The author's purpose is to attract customers to Carl's Car Depot. The text from the extract clearly emphasizes the one-day-only summer sale event at Carl’s Car Depot, highlighting the wide range of cars available at discounted prices with special financing options. The author aims to draw in potential customers by presenting compelling offers and creating a sense of urgency. Choices A, B, and C are incorrect because the primary focus is on attracting customers to Carl’s Car Depot by showcasing the available cars and the limited-time sale, not solely informing customers about the cars, urging other dealerships to lower prices, or generally providing affordable cars.

Similar Questions