Nursing Elites

1. What is the structural and functional unit of the kidney responsible for filtering blood?

• A. Nephron
• B. Ureter
• C. Urethra
• D. Bladder

Correct answer: A

Rationale: The nephron is the correct answer. It is the structural and functional unit of the kidney responsible for filtering blood. The nephron consists of a renal corpuscle (glomerulus and Bowman's capsule) and a renal tubule. Within the nephron, blood is filtered to form urine, which is then carried to the ureter for excretion from the body. Choices B, C, and D are incorrect because the ureter, urethra, and bladder are not involved in the filtration of blood in the kidney. Instead, they are parts of the urinary system responsible for transporting and storing urine.

2. A recycling company collects sorted materials from its clients. The materials are weighed and then processed for re-use. The chart shows the weights of various classes of materials that were collected by the company during a representative month. Which of the following statements is NOT supported by the data in the chart?

• A. Paper products, including cardboard, make up a majority of the collected materials.
• B. One quarter of the materials collected are made of glass.
• C. More plastic is collected than cardboard.
• D. Plastic and cardboard together represent a larger portion of the collected materials than glass bottles.

Correct answer: C

Rationale: The chart data does not support the statement that more plastic is collected than cardboard. Looking at the chart data, we can see that paper products, including cardboard, make up the majority of the collected materials. Glass accounts for one quarter of the materials collected. When we compare plastic and cardboard, we can see that cardboard weighs more than plastic. Therefore, the statement that more plastic is collected than cardboard is not supported by the data. Additionally, combining plastic and cardboard weights still does not exceed the weight of glass bottles according to the chart.

3. In physics, what does the term 'terminal velocity' refer to?

• A. Maximum velocity reached by an object in free fall
• B. Velocity when the object is at rest
• C. Instantaneous velocity of an object
• D. Velocity only reached by heavy objects

Correct answer: A

Rationale: Terminal velocity in physics refers to the maximum velocity achieved by an object in free fall when the force of gravity equals the force of air resistance. At terminal velocity, the object stops accelerating and maintains a constant speed. This occurs when the opposing forces are balanced, leading to no further increase in speed. Choice B is incorrect as velocity when the object is at rest is zero, not at terminal velocity. Choice C is incorrect as instantaneous velocity refers to the velocity at a specific moment in time, not the maximum speed reached in free fall. Choice D is incorrect because terminal velocity is not exclusive to heavy objects; all objects in free fall can reach terminal velocity under the right conditions.

4. Which muscle is voluntary, striated, and found attached to bones?

• A. Smooth muscle
• B. Skeletal muscle
• C. Cardiac muscle
• D. Epithelial muscle

Correct answer: B

Rationale: The correct answer is B, Skeletal muscle. Skeletal muscle is both voluntary and striated, as well as attached to bones, allowing for movement. Smooth muscle, on the other hand, is involuntary and typically found in the walls of internal organs, controlling functions like digestion. Cardiac muscle is also striated, but it is involuntary and specifically found in the heart, responsible for cardiac contractions to pump blood. 'Epithelial muscle' is an incorrect term; epithelial tissue is a type of tissue that forms the linings of various body surfaces and structures, not a muscle type.

5. How does the author distinguish between different groups of insects mentioned in the passage?

• A. By describing the specific characteristics and adaptations of each insect group.
• B. By grouping them based on their habitat into aquatic and aerial categories.
• C. By explaining the stages of development each insect undergoes.
• D. By identifying their habitats and the environments they are adapted to.

Correct answer: B

Rationale: The author distinguishes between different groups of insects based on their habitat, categorizing them into aquatic and aerial categories. The passage mentions how some insects spend time under water while others live in the air, emphasizing the distinction between aquatic and aerial habitats. Therefore, choice B is correct. Choices A, C, and D are incorrect because the passage does not focus on describing the specific characteristics, adaptations, stages of development, or environments of the insects, but rather on their habitat and lifestyle.

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