Nursing Elites

1. What is the relationship between the speed of a wave, its frequency, and wavelength in a given medium?

• A. Speed = Frequency × Wavelength
• B. Speed = Frequency ÷ Wavelength
• C. Speed = Frequency + Wavelength
• D. Speed = Frequency - Wavelength

Correct answer: a

Rationale: In a given medium, the speed of a wave equals the product of its frequency and wavelength.

2. What is the lysosome?

• A. A sac-like structure that contains enzymes that break down cellular components
• B. A network of tubules that transport proteins and lipids throughout the cell
• C. The site of protein synthesis
• D. The site of cellular respiration

Correct answer: A

Rationale: Rationale: Lysosomes are membrane-bound organelles found in animal cells that contain digestive enzymes. These enzymes help break down various cellular components, such as proteins, lipids, carbohydrates, and even foreign particles like bacteria. This process of breaking down and recycling cellular components is essential for maintaining cell health and function. Options B, C, and D do not accurately describe the function or structure of a lysosome.

3. What is the main factor limiting population growth in K-strategists?

• A. Predation
• B. Availability of resources
• C. Competition
• D. Disease

Correct answer: B

Rationale: Rationale: K-strategists are species that have a low reproductive rate and invest more resources in raising fewer offspring. These species typically inhabit stable environments where resources are limited. The main factor limiting population growth in K-strategists is the availability of resources such as food, shelter, and space. When resources are scarce, K-strategists may struggle to find enough resources to support their population size, leading to decreased reproductive success and population growth. Predation (option A), competition (option C), and disease (option D) can also impact population growth, but the primary limiting factor for K-strategists is the availability of resources.

4. The term "unconditional" in the context of UBI signifies that

• A. The amount received would be based on individual income and living expenses.
• B. Recipients would be required to meet certain criteria to qualify for the program.
• C. The money would be provided without any restrictions on how it is spent.
• D. The program would be temporary and subject to periodic review and renewal.

Correct answer: C

Rationale: The unconditional aspect of UBI refers to the lack of strings attached to its receipt, aligning with C.

5. Which vitamin is synthesized in the skin upon exposure to sunlight?

• A. Vitamin A
• B. Vitamin C
• C. Vitamin D
• D. Vitamin E

Correct answer: A

Rationale: The correct answer is Vitamin D (C). When the skin is exposed to sunlight, a compound in the skin is converted to Vitamin D. Vitamin A (A) is not synthesized in the skin but is found in foods like carrots and sweet potatoes. Vitamin C (B) is not synthesized in the skin either, but is found in citrus fruits and vegetables. Vitamin E (D) is not synthesized in the skin upon sunlight exposure, but is found in nuts and seeds.

6. What is the feedback mechanism in the endocrine system that helps maintain hormone balance?

• A. Positive feedback, where a hormone stimulates its own release
• B. Negative feedback, where a hormone suppresses its own release
• C. Cascade effect, where one hormone triggers the release of another
• D. Dual hormone system, where two hormones work together

Correct answer: B

Rationale: The correct answer is B: Negative feedback, where a hormone suppresses its own release. In the endocrine system, negative feedback is a crucial mechanism that helps maintain hormone balance. When hormone levels rise, they signal the body to decrease further hormone production, preventing an excess. This ensures that hormone levels stay within a narrow range, promoting stability and homeostasis. Positive feedback (option A) would lead to an amplification of hormone release, which is not ideal for maintaining balance. Cascade effect (option C) involves a sequential activation of hormones but does not directly regulate hormone levels. Dual hormone system (option D) refers to two hormones working together but doesn't specifically address the feedback mechanism for maintaining hormone balance.

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