Goose-flesh' is-

Correct Answer: A

Rationale: The correct answer is A because "goose-flesh" or goosebumps occur when the arrector pili muscles contract, causing hairs to stand upright. This physiological response is triggered by various factors like cold temperatures or emotions. Choice B is incorrect as it describes whiskers on a rabbit's upper lip. Choice C is incorrect as sebum is related to skin oil production, not goose-flesh. Choice D is incorrect as it refers to uncooked pork meat, which is unrelated to the physiological mechanism of goose-flesh.

Correct Answer: C

Rationale: Certainly! The correct answer is C: Perspiration. Copious sweat secretion is the body's way of regulating temperature through evaporative cooling. Blubber (A) refers to a layer of fat in marine mammals. Pelage (B) refers to an animal's fur or hair. Goose flesh (D) is the raised bumps on the skin due to cold or emotional stress. Perspiration is the specific term for the secretion of sweat by sweat glands for thermoregulation, making it the correct choice in this context.

Correct Answer: A

Rationale: The correct answer is A: Panniculus carnosus. This muscle is responsible for moving and shaking the skin, particularly in animals. It is a thin layer of muscle found in the subcutaneous tissue. It contracts to create goosebumps and aid in thermoregulation. The other choices, B: Collagen fibers, C: Sphincter muscles, and D: Arrector pili, do not directly move and shake the skin. Collagen fibers provide structural support, sphincter muscles control the opening and closing of passages, and arrector pili are responsible for hair erection, not skin movement.

Correct Answer: C

Rationale: The correct answer is C: Columnar. The cells of stratum malpighi are columnar in shape as they are tall and rectangular, providing structural support and protection to the underlying layers of skin. The other choices are incorrect because A: Oval, B: Flat, and D: Spherical do not accurately describe the shape of cells in stratum malpighi. The cells in this layer are specifically columnar to serve their function in the epidermis.

Correct Answer: B

Rationale: The correct answer is B because scar tissue is primarily composed of collagen fibers, which are produced by fibroblasts during the wound healing process. Collagen fibers provide structural support and help in tissue repair. Scar tissue also has relatively few blood vessels compared to normal tissue. A: Increased numbers of fibroblasts alone do not directly result in scar tissue formation. C: The stratum germinativum is part of the epidermis and not directly involved in the formation of scar tissue. D: Scar tissue does not involve an increase in epidermal layers; it is mainly about the dermal layer with collagen deposition.