Cyanosis signifies that a patient has

Correct Answer: A

Rationale: Step 1: Cyanosis is a bluish discoloration of the skin due to insufficient oxygen in the blood. Step 2: Oxygen-starved blood appears bluish as it reflects less red light. Step 3: Therefore, cyanosis signifies a lack of oxygen in the blood, not related to sun exposure. Summary: Choice A is correct as it accurately reflects the physiological cause of cyanosis. Choices B, C, and D are incorrect as they do not relate to the underlying mechanism of cyanosis.

Correct Answer: D

Rationale: The correct answer is D, stratum corneum. Insensible perspiration involves the constant evaporation of water through the skin to maintain body temperature. The stratum corneum is the outermost layer of the epidermis, consisting of dead cells that are continuously shed and replaced. This layer provides a barrier function and regulates the loss of water from the body. The other choices (A: stratum granulosum, B: stratum basale, C: stratum spinosum) are not involved in insensible perspiration as they are deeper layers of the epidermis responsible for cell division, keratin production, and structural support.

Correct Answer: C

Rationale: The correct answer is C: Vellus hairs. Vellus hairs are fine, unpigmented hairs that cover most of the body surface. They are short, thin, and barely noticeable. Velvet hairs (A) and follicular hairs (B) are not specific types of hairs. Terminal hairs (D) are thicker, coarser, and darker hairs found on the scalp, armpits, and pubic region, not fine and lacking pigment like vellus hairs. Therefore, vellus hairs are the correct choice for fine, pigmentless hairs covering much of the body surface.

Correct Answer: C

Rationale: The correct answer is C: fissure. A fissure is a groove or crack-like break in the skin. The term accurately describes the characteristic mentioned in the question. Exudate (A) refers to fluid discharge, hidrosis (B) refers to sweating, and heparin (D) is a medication used as a blood thinner. These choices are unrelated to the description of a groove or crack-like break in the skin, making them incorrect in this context.

Correct Answer: A

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.