Nursing Elites

1. How does an increase in surface area affect the force of friction between two surfaces?

• A. Increases friction
• B. Decreases friction
• C. Has no effect on friction
• D. Causes unpredictable changes in friction

Correct answer: b

Rationale: Increasing surface area reduces the force per unit area, decreasing friction.

2. Which of the following best describes the function of the pericardium?

• A. It regulates blood flow through valves within the heart.
• B. It acts as a protective sac surrounding the heart.
• C. It generates the electrical impulses for heart contractions.
• D. It transmits electrical signals between the atria and ventricles.

Correct answer: B

Rationale: The correct answer is B: "It acts as a protective sac surrounding the heart." The pericardium is a double-layered membrane that surrounds and protects the heart, providing physical support and preventing overexpansion. It also helps reduce friction between the heart and surrounding structures during heartbeats. Options A, C, and D are incorrect as they describe functions of other parts of the heart such as valves, electrical impulse generation, and transmission pathways, respectively. Understanding the role of the pericardium in protecting the heart is crucial for comprehending the anatomical and physiological aspects of the cardiovascular system.

3. A ball is rolling across the floor and comes to a stop on its own. What force caused the ball to stop?

• A. Gravitational force
• B. Normal force from the floor
• C. Air resistance
• D. None of the above

Correct answer: C

Rationale: In the absence of other forces, air resistance will gradually slow down the ball until it stops.

4. Stephanie is often seen interacting with the medical intern during coffee breaks and after duty

• A. Formal
• B. Informal
• C. Staff
• D. Line

Correct answer: B

Rationale: The correct answer is 'B: Informal.' Stephanie's interactions with the medical intern during coffee breaks and after duty suggest a casual and friendly relationship, rather than a formal or official one. 'Informal' describes interactions that are relaxed, personal, and not bound by strict professional protocols. In contrast, 'formal' interactions would involve more structured and official communication, such as meetings or professional discussions. 'Staff' and 'line' are not relevant in this context, as they do not describe the nature of the relationship between Stephanie and the medical intern.

5. What is the product of the complete combustion of propane (C3H8)?

• A. CO2
• B. CO
• C. CH4
• D. C

Correct answer: a

Rationale: Complete combustion of hydrocarbons produces carbon dioxide (CO2) and water.

6. Which of the following is NOT true about fossils?

• A. They can provide evidence for the order of appearance of different species
• B. They can be used to estimate the age of rocks and layers
• C. They can tell us about the behavior of extinct organisms
• D. They are always perfectly preserved

Correct answer: D

Rationale: Rationale: A) This statement is true. Fossils can provide evidence for the order of appearance of different species through the study of the fossil record. B) This statement is true. Fossils can be used to estimate the age of rocks and layers through relative dating methods such as stratigraphy and absolute dating methods like radiometric dating. C) This statement is true. Fossils can provide information about the behavior of extinct organisms through the study of their preserved remains and traces. D) This statement is NOT true. Fossils are not always perfectly preserved. In many cases, fossils are incomplete, fragmented, or altered over time due to geological processes. The level of preservation can vary depending on factors such as the type of organism, the environment in which it lived, and the processes involved in fossilization.

Similar Questions