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

Correct Answer: C

Rationale: The correct answer is C: Organ. An organ is a group of tissues that work together to perform specific functions. The heart is made up of different types of tissues (muscle, nerve, connective) that work together to pump blood throughout the body. It is more complex than a single cell (A), a group of cells (tissue - B), or a system of organs working together (body system - D). The heart's structure and function clearly demonstrate its classification as an organ.

Correct Answer: A

Rationale: The correct answer is A: Open wound. An open wound refers to a break in the skin, exposing underlying tissues to the external environment. This is different from a closed wound (B) where the skin is intact. A contusion (C) is a bruise without a break in the skin, while a bruise (D) is a type of closed wound characterized by discoloration due to blood pooling under the skin. Therefore, in this scenario, the presence of skin not intact indicates an open wound, making choice A the correct option.

Correct Answer: A

Rationale: The correct answer is A: Enables speech. The larynx houses the vocal cords, which vibrate to produce sound during speech. The other choices are incorrect because B is the function of the epiglottis, which blocks food from entering the trachea, C is the function of the pharynx, which allows for the passage of air and food, and D is the function of the trachea, which transfers air to the lungs.

Correct Answer: B

Rationale: The correct answer is B: Urinary tract infections. Adequate fluid intake post total knee replacement helps prevent UTIs by flushing out bacteria from the urinary tract. Myocardial infarctions are not directly related to fluid intake. Depression is not prevented by fluid intake. Side effects of medication are not specifically prevented by encouraging fluids.

Correct Answer: C

Rationale: The correct answer is C: Reassure the resident who is upset. This response acknowledges the resident's feelings and provides comfort and support, helping to reduce their distress. Telling the resident it is not real (A) may invalidate their experience. Saying they see the hallucination too (B) can exacerbate the situation. Laughing at the resident (D) is highly inappropriate and disrespectful.