While providing care for a patient who has recently completed chemotherapy for colorectal cancer, the nurse notes the patient has an elevated carcinoembryonic antigen (CEA) level.

Correct Answer: B

Rationale: The correct answer is B because an elevated CEA level after completing chemotherapy for colorectal cancer indicates the possibility of residual or recurrent tumor. CEA is a tumor marker that can indicate the presence of cancer cells in the body. Elevated levels post-chemotherapy could suggest that not all cancer cells were eliminated, leading to the potential for a recurrence. Choice A is incorrect because an elevated CEA level does not definitively mean the patient is cured. Choice C is incorrect as chemotherapy typically targets cancer cells and not the liver itself. Choice D is incorrect since an elevated CEA level does not indicate the need for isolation but rather further investigation for potential tumor recurrence.

Correct Answer: D

Rationale: The correct answer is D: Germinativum. The stratum spinosum and stratum basale are together known as the stratum germinativum because they are the layers of the epidermis where cell division and renewal occur. The stratum lucidum is a clear layer found only in thick skin, stratum corneum is the outermost layer of the epidermis composed of dead skin cells, and stratum granulosum is the layer where keratinocytes undergo transformation. These choices are incorrect as they do not specifically refer to the layers responsible for cell division and renewal in the epidermis.

Correct Answer: A

Rationale: The correct answer is A: Skin. Pacinian corpuscles are sensory receptors responsible for detecting pressure and vibration. They are located in the skin's deeper layers, particularly in the subcutaneous tissue. These receptors adapt quickly to changes in pressure, making them ideal for detecting dynamic stimuli. Choices B, C, and D are incorrect as Pacinian corpuscles are not typically found in the alimentary canal, liver, or lungs. The specific location of Pacinian corpuscles in the skin is crucial for their function in sensing external stimuli and transmitting sensory information to the brain.

Correct Answer: A

Rationale: The correct answer is A because vibrissae, also known as whiskers, are essential for a rabbit's navigation and sensing its surroundings. Without whiskers, a rabbit may struggle to move freely and may become disoriented. Choice B is incorrect as speed is not solely determined by the presence of vibrissae. Choice C is incorrect as the rabbit may still attempt to move even without vibrissae. Choice D is incorrect as removing vibrissae will have an impact on the rabbit's mobility and spatial awareness.

Correct Answer: D

Rationale: The correct answer is D: Lysozyme. Lysozyme is an anti-bacterial enzyme found in tears that helps protect the eyes from infections. It works by breaking down the cell walls of bacteria, thus preventing their growth. Lacrimin (A) is a protein involved in tear production, not an anti-bacterial enzyme. Interferon (B) is a protein produced by the immune system to fight viruses, not found in tears. Pepsin (C) is a digestive enzyme produced in the stomach, not present in tears. Therefore, the correct answer is D because lysozyme is the specific anti-bacterial enzyme found in tears.