Neurons are supporting cells in nervous tissue that can reproduce through cell division.

A. The cells of the epidermis store glucose as glycogen for energy:Epidermal cells do not function as a significant glucose storage site. Glycogen storage occurs primarily in the liver and skeletal muscle, not in the skin.

B. It converts modified epidermal cholesterol to a vitamin D precursor important to calcium metabolism:The skin plays a critical role in synthesizing vitamin D. UVB radiation converts 7-dehydrocholesterol in the epidermis to cholecalciferol (vitamin D3), which is essential for calcium absorption and bone health.

C. It absorbs vitamin C so that the skin will not be subject to diseases:While vitamin C is important for collagen synthesis and skin health, the skin does not actively absorb vitamin C from the environment. Dietary intake is the primary source.

D. It aids in the transport of materials throughout the body:The skin does not serve as a transport system for materials like blood vessels do. Its role is mainly protective, sensory, and metabolic, not circulatory.

A. Nonkeratinized stratified squamous:This epithelium type is found in areas subject to friction and abrasion, such as the esophagus and oral cavity. Its multiple layers make it unsuitable for efficient gas exchange, as diffusion is slowed by the thickness of the tissue.

B. Simple columnar:Simple columnar epithelium is specialized for absorption and secretion, commonly found in the gastrointestinal tract. Its tall cell structure is not ideal for rapid diffusion, making it poorly suited for alveolar gas exchange.

C. Simple squamous:Simple squamous epithelium consists of a single, thin layer of flat cells. Its delicate structure provides a minimal barrier for diffusion, allowing oxygen and carbon dioxide to rapidly pass through the alveolar walls during respiration.

D. Simple cuboidal:Simple cuboidal epithelium is found in glands and kidney tubules where secretion and absorption occur. Its cube-shaped cells are thicker than squamous cells, creating a greater distance for gases to diffuse, which reduces efficiency in the lungs.