Nursing Elites

1. What is the primary function of the lymphatic system?

• A. To transport oxygen throughout the body
• B. To filter blood and remove waste
• C. To fight infection and remove excess fluid
• D. To transport hormones

Correct answer: C

Rationale: The correct answer is C: 'To fight infection and remove excess fluid.' The lymphatic system plays a crucial role in the body's immune response by fighting infections through lymphocytes and removing excess fluid from tissues, maintaining fluid balance. It does not primarily transport oxygen, filter blood, or transport hormones. While the lymphatic system is involved in lipid absorption and transport, its primary functions are related to immunity and fluid balance.

2. Which structure of the nervous system carries an action potential in the direction of a synapse?

• A. Cell body
• B. Axon
• C. Neuron
• D. Myelin

Correct answer: B

Rationale: The correct answer is the axon. The axon is the elongated, threadlike part of a neuron that carries nerve impulses away from the cell body towards other neurons or target cells, such as muscles or glands, in the direction of a synapse. Action potentials travel along the axon as electrical signals to communicate with neighboring cells. The cell body (choice A) contains the nucleus and organelles but does not transmit action potentials. Neuron (choice C) is a broad term that includes the entire nerve cell, not a specific structure. Myelin (choice D) is a fatty substance that surrounds and insulates axons, aiding in the conduction of nerve impulses, but it does not directly carry the action potential towards a synapse.

3. According to the passage, what effect does encountering an automobile with eighteen wheels have on the hypothesis 'All automobiles have only four wheels'?

• A. It proves the hypothesis.
• B. It raises the hypothesis's probability.
• C. It disproves the hypothesis.
• D. It decreases the hypothesis's probability.

Correct answer: C

Rationale: Encountering an automobile with eighteen wheels contradicts the hypothesis that all automobiles have only four wheels. This contradicts the initial hypothesis, proving it to be false. The passage explains that when evidence disproves a hypothesis, it directly contradicts the hypothesis, leading to its disproof. In the context of the monkey example provided, encountering a hairless monkey out of many hairy monkeys disproved the hypothesis 'All monkeys are hairy.' Therefore, the presence of an automobile with eighteen wheels disproves the hypothesis that all automobiles have only four wheels. Other choices are incorrect because encountering such an automobile directly contradicts the initial hypothesis, leading to its disproof, rather than proving it, raising its probability, or decreasing its probability.

4. A rocket blasts off from Earth. What is the main force propelling the rocket upwards?

• A. Gravitational force
• B. Air resistance
• C. Thrust from the rocket engine
• D. Normal force from the launchpad

Correct answer: C

Rationale: The main force propelling the rocket upwards is the thrust from the rocket engine. Thrust is the force produced by the rocket engine pushing exhaust gases in the opposite direction, following Newton's third law of motion (action and reaction). This thrust overcomes the force of gravity and allows the rocket to lift off and move upwards. Choice A, gravitational force, is incorrect as gravity pulls objects towards the Earth, and in this case, the rocket is moving against gravity. Choice B, air resistance, is incorrect because it opposes the motion of the rocket and is more relevant during descent rather than ascent. Choice D, normal force from the launchpad, is incorrect as this force acts perpendicular to the surface and does not propel the rocket upwards.

5. Which option best exemplifies an author's use of alliteration and personification?

• A. Her mood hung about her like a weary cape, very dull from wear.
• B. It shuddered, swayed, shook, and screamed its way into dust under hot flames.
• C. The house was a starch sentry, warning visitors away.
• D. At its shoreline, visitors swore they heard the siren call of the cliffs above.

Correct answer: B

Rationale: Option B, 'It shuddered, swayed, shook, and screamed its way into dust under hot flames,' best exemplifies an author's use of alliteration and personification. The phrase uses alliteration by repeating the 's' sound and personification by attributing human actions like shuddering and screaming to an inanimate object. Options A, C, and D do not contain both alliteration and personification. Option A uses personification but lacks alliteration. Option C uses personification but lacks alliteration. Option D contains personification but lacks alliteration as well.

Similar Questions