When a nursing assistant is serving meals to residents she must always:

Correct Answer: B

Rationale: The correct answer is B: Identify the resident. This is essential to ensure that meals are served to the correct individuals according to their dietary needs and preferences. By identifying the resident, the nursing assistant can verify the meal matches the correct resident's diet plan. A: Prepare a diet card for each resident - This is not the responsibility of a nursing assistant as diet cards are typically prepared by dietitians or healthcare professionals. C: Prepare the meal for each resident - Nursing assistants may help with meal preparation, but it is not their main responsibility to prepare every meal for each resident. D: Prepare a diet plan for each resident - Diet plans are typically created by dietitians or healthcare professionals based on individual needs, not by nursing assistants.

Correct Answer: C

Rationale: The correct answer is C because keeping the genital area clean is essential in preventing infection during catheter care. This step helps reduce the risk of introducing bacteria into the urinary tract, which can lead to urinary tract infections. Maintaining proper hygiene in the genital area also promotes overall comfort and well-being for the resident. A is incorrect as the drainage bag should be positioned below the level of the bladder to facilitate proper drainage. B is incorrect as disconnecting the catheter can introduce contaminants and increase the risk of infection. D is incorrect as hanging the drainage bag from the bedrail can cause backflow of urine and increase the risk of infection.

Correct Answer: D

Rationale: The correct answer is D - Red or a different color than the surrounding area. In a stage 1 pressure injury, the skin appears red or a different color due to localized damage. This indicates early tissue damage without skin breakdown. Choice A is incorrect as it refers to a stage 2 pressure injury where the skin is nonintact. Choice B describes a stage 3 or 4 pressure injury with a deep crater. Choice C is not accurate as deep purple color is not typically associated with stage 1 pressure injuries.

Correct Answer: A

Rationale: The correct answer is A: Lung strength decreases. As people age, their lung capacity decreases due to changes in lung tissue elasticity and muscle strength, leading to decreased respiratory function. This results in reduced lung strength and efficiency. Option B is incorrect as airways actually become less elastic with age, contributing to decreased lung function. Option C is incorrect as aging can lead to a weaker cough reflex. Option D is incorrect as oxygen levels in the blood do not typically increase with age; in fact, they may decrease due to reduced lung function.

Correct Answer: C

Rationale: The correct answer is C: Neuron. Neurons are the basic working units of the nervous system because they are specialized cells that transmit information through electrical and chemical signals. Neurons have a cell body, dendrites, and an axon, allowing them to receive, process, and send signals. The brain and spinal cord are made up of neurons but are not the basic working unit. Receptors are sensory organs that detect stimuli but do not transmit signals like neurons do. Therefore, the correct choice is C because neurons are essential for communication within the nervous system.