Integumentary system consists of epidermis in mammals is termed-

Correct Answer: A

Rationale: The correct answer is A: Skin. The integumentary system consists of the skin, which includes the epidermis, dermis, and hypodermis. The epidermis is the outermost layer of the skin, providing protection and regulating temperature. Choice B (Skin and skin derivatives) is incorrect as the epidermis itself is considered part of the skin, not a derivative. Choice C (Skin and cutaneous gland) and choice D (Skin and hairs) are also incorrect as they are specific structures or components of the skin, not the entire integumentary system. The term "skin" encompasses all layers and structures that make up the integumentary system, making choice A the most appropriate answer.

Correct Answer: A

Rationale: The correct answer is A because if dead cells of the stratum corneum are alive, it means the skin barrier is compromised, allowing bacteria to penetrate the skin and enter the body, leading to potential infections and health risks. Choice B is incorrect because the growth of hairs is unrelated to the status of the stratum corneum. Choice C is incorrect as the secretion of sweat is not directly affected by the condition of the stratum corneum. Choice D is incorrect because bacteria developing on the skin is a common occurrence, regardless of the state of the stratum corneum.

Correct Answer: A

Rationale: The correct answer is A: Epidermis. In rabbits, hairs and most glands are developed from the epidermis, the outermost layer of the skin. The epidermis contains specialized cells that differentiate into hair follicles and various glands. The dermis (choice B) is the layer beneath the epidermis, primarily consisting of connective tissue. The subcutaneous layer (choice C) is primarily made of fat cells and helps insulate the body. The reticular layer (choice D) is part of the dermis and provides structural support. Therefore, the epidermis is the correct choice as it is the primary source of hair and gland development in rabbits.

Correct Answer: A

Rationale: The correct answer is A: Mastology. The term "masto-" refers to breasts or mammary glands, making mastology the study of mammary glands. Stomatology (B) is the study of the mouth and its diseases, heptatology (C) is the study of the liver, and angiology (D) is the study of blood vessels. Therefore, A is the only choice that accurately represents the study of mammary glands.

Correct Answer: C

Rationale: The correct answer is C: Apocrine. Mammary glands secrete milk through the process of apocrine secretion, where the cell membrane buds off to release the secretory product. This is different from merocrine secretion (choice A) where the secretory product is released by exocytosis without any loss of cytoplasm, and holocrine secretion (choice B) where entire cells are released with their secretory product. Choice D is incorrect because mammary glands do indeed secrete milk through apocrine secretion.