We do not feel pain in cutting our nail because nails are not supplied with-

Correct Answer: C

Rationale: The correct answer is C: Nerves. Nails do not contain nerves, which are responsible for transmitting pain signals to the brain. Without nerves, the sensation of pain cannot be felt when cutting the nails. Blood vessels (choice A) and bones (choice B) are not directly related to the sensation of pain in this scenario. Choice D is incorrect as nails do not contain any of these structures that would transmit pain. In summary, the absence of nerves in nails is the reason why we do not feel pain when cutting them.

Correct Answer: A

Rationale: The correct answer is A: Oily. Sebaceous glands secrete an oily substance called sebum, which helps lubricate and waterproof the skin and hair. Sebum is composed of lipids and fatty acids, giving it an oily consistency. Choice B (Watery) is incorrect as sebaceous glands do not secrete a watery substance. Choice C (Creamy) is incorrect as sebum is not creamy in texture. Choice D (Mucoid) is incorrect as sebaceous glands do not secrete a mucoid substance. The oily nature of sebum is essential for maintaining skin health and function.

Correct Answer: A

Rationale: The correct answer is A: Stratum germinativum. This layer of stem cells constantly divides to renew the epidermis. The stratum germinativum is also known as the basal layer and is located at the bottom of the epidermis. It contains actively dividing cells responsible for producing new skin cells. The basal lamina (B) is a structure that separates the epidermis from the dermis but does not contain dividing stem cells. The stratum corneum (C) is the outermost layer of the epidermis composed of dead skin cells. The stratum granulosum (D) is a layer of the epidermis where cells begin to flatten and lose their nuclei, but it is not where active cell division occurs.

Correct Answer: B

Rationale: The correct answer is B: Areolar connective tissue. In the image, region '2' appears loose and has fibroblasts, collagen fibers, and elastic fibers, typical of areolar connective tissue. Areolar tissue is a loose connective tissue that provides support and elasticity. Rationale: 1. Areolar connective tissue is characterized by loose arrangement of cells and fibers, providing support and elasticity. 2. Presence of fibroblasts, collagen fibers, and elastic fibers in region '2' matches the characteristics of areolar connective tissue. 3. Areolar tissue is commonly found beneath the epithelial layers and around blood vessels and organs, supporting the body and connecting different tissues. Summary: A: Reticular connective tissue is more densely packed with reticular fibers and is found in organs like the spleen and lymph nodes. C: Stratified squamous epithelium is a type of epithelial tissue, which is not seen in region '2'.

Correct Answer: A

Rationale: Step-by-step rationale: 1. Melanin increases in concentration during sun exposure to protect the skin. 2. Option A is incorrect as melanin actually increases in concentration to protect against UV radiation. 3. Melanin is typically brown or black (B), released through melanosomes (C), and protects DNA from UV damage (D). 4. In summary, option A is the correct answer because melanin does not decrease in concentration during sun exposure; it increases to provide protection.