A client has been diagnosed with a deep vein thrombosis and is to be discharged on warfarin (Coumadin). The client is adamant about refusing the drug because 'it's dangerous.' What action by the nurse is best?

Correct Answer: A

Rationale: The correct answer is A: Assess the reason behind the client's fear. This is the best action because it allows the nurse to understand the client's specific concerns and address them effectively. By exploring the client's fears, the nurse can provide personalized education and support, potentially alleviating the client's anxieties and increasing compliance. Choice B is incorrect because simply reminding the client about laboratory monitoring does not address the underlying fear. Choice C is incorrect as general statements about drug safety may not address the client's specific concerns. Choice D is also incorrect as it focuses on consequences rather than addressing the root cause of the client's refusal.

Correct Answer: B

Rationale: The correct answer is B: Melanocytes. Melanocytes are the cells responsible for producing melanin, the pigment that gives color to skin, hair, and eyes. In rabbits, melanin is contained in these specialized cells, not in chromatophores (A), which are found in fish and amphibians. Melanin granules (C) are the actual pigment produced by melanocytes, not the cells themselves. Carotene granules (D) are unrelated to melanin production and are responsible for the orange color in some animals. Therefore, the correct answer is B as melanocytes are specifically responsible for producing melanin in rabbits.

Correct Answer: D

Rationale: The correct answer is D: Sole. The thickest portion of skin in humans is found on the soles of the feet due to the constant pressure and friction they endure from walking and standing. This leads to a thicker layer of protective skin to provide support and cushioning. The head (A), thumb (B), and palm (C) do not experience the same level of pressure and friction as the soles, resulting in thinner skin layers in those areas. Thus, the sole is the correct choice for the thickest portion of skin in humans.

Correct Answer: A

Rationale: The correct answer is A: Simple tubular. Sweat glands are classified based on their shape and structure. Simple tubular glands have a long, straight tube for secretion, which matches the structure of sweat glands. Simple alveolar glands have a rounded sac shape, not seen in sweat glands. Compound acinar glands have a branched, sac-like structure, and compound tubular glands have a branched, tube-like structure, neither of which matches the structure of sweat glands. Therefore, the correct answer is A as sweat glands are characterized by a simple tubular structure.

Correct Answer: D

Rationale: The correct answer is D: Shrew. Shrews are known to have red-colored sweat due to a pigment called porphyrin. This pigment gives their sweat a reddish hue. Kangaroos, elephants, and rhinoceroses do not have red sweat. Kangaroos sweat is colorless, elephants' sweat is clear, and rhinoceroses sweat may appear red due to mud or dust, not because of any pigment. Therefore, the red-colored sweat is unique to shrews, making choice D the correct answer.