The heart is an example of a(n) ______.

Correct Answer: C

Rationale: The correct answer is C: Organ. An organ is a structure made up of different tissues working together to perform a specific function, such as the heart pumping blood. It is not a single cell (A), a group of cells (B), or a collection of organs working together (D). The heart fits the definition of an organ, making choice C the most appropriate.

Correct Answer: A

Rationale: The correct answer is A: Open wound. An open wound refers to any break in the skin's surface, exposing underlying tissues. In contrast, a closed wound does not break the skin. A contusion is a bruise resulting from blunt force trauma, while a bruise specifically refers to discoloration of the skin due to broken blood vessels beneath the skin without breaking the skin itself. Therefore, in this scenario, the skin not being intact categorizes it as an open wound rather than a closed wound, contusion, or bruise.

Correct Answer: A

Rationale: The correct answer is A: Enables speech. The larynx, also known as the voice box, contains vocal cords that vibrate to produce sound, enabling speech. Choice B is incorrect because the epiglottis, not the larynx, blocks food from entering the trachea. Choice C is incorrect as the larynx is not involved in the passage of food. Choice D is incorrect because the larynx does not transfer air to the lungs, but rather filters and humidifies air before it reaches the lungs.

Correct Answer: B

Rationale: The correct answer is B: Urinary tract infections. Hydration is important post total knee replacement to prevent UTIs due to immobility leading to urinary stasis. Myocardial infarctions are not directly related to fluid intake. Depression is managed through psychological support, not just fluids. Side effects of medication are not solely prevented by increased fluid intake.

Correct Answer: C

Rationale: The correct answer is C because reassuring the resident who is upset shows empathy and support, helping to calm them down. Telling the resident it is not real (A) may invalidate their experience. Saying they see the hallucination too (B) can worsen the situation. Laughing at the resident (D) is unprofessional and insensitive.