Hank is undergoing puberty. Some of his facial hairs, which were up to this point ______ hairs, are now becoming _______ hairs.

A. tightly packed cells: Epithelial tissue consists of cells that are closely packed together with minimal extracellular space, forming continuous sheets that cover surfaces or line cavities. This allows for effective protection, absorption, and secretion.

B. extensive extracellular matrix: This is characteristic of connective tissue, not epithelial tissue. Epithelial tissue has very little extracellular matrix.

C. a rich blood supply: Epithelial tissues are avascular, meaning they lack a direct blood supply. They receive nutrients via diffusion from underlying connective tissue.

D. presence of lacunae: Lacunae are small spaces that contain cells in cartilage or bone tissue, not epithelial tissue.

A. apocrine: Apocrine glands release part of their cytoplasm with the secretion, which can include membrane-bound substances like phospholipids.

B. merocrine: Merocrine glands secrete products via exocytosis without releasing any cytoplasm or membrane material. Their secretions do not contain phospholipids.

C. sebaceous: Sebaceous glands are holocrine glands that release the entire cell contents, including membrane lipids such as phospholipids.

D. holocrine: These glands release whole cells that disintegrate, leading to secretions rich in lipids, including phospholipids.