Question

Cell of germinal epithelium are___________
(a) Cuboidal
(b) Columnar
(c) Squamous
(d) Ciliated

Answer 1

Hint: Epithelial tissue lies on the internal and external body surface which occurs in one or more layers forming a protective covering sheet. Epithelial tissue functions for protection, secretion, absorption, and excretion which depend on the presence or absence of microvilli on the tissue.

Complete answer:
Epithelial tissue is of two types simple and compound. In simple epithelial, cuboidal cells form germinal epithelium which is square or cubical with an equal surface area that functions for the production of gametes. In some cuboidal epithelium, microvilli are present on the free surface which gives a brush border-like appearance therefore also called brush bordered cuboidal epithelium. Cuboidal epithelium functions for absorption and lies on the small salivary duct, pancreatic duct, thyroid vesicles, internal ear, and in the proximal part of urinary tubules.

Additional Information: Simple epithelium is also divided into the squamous epithelium, cuboidal epithelium, columnar epithelium, ciliated epithelium, and pseudostratified epithelium. Squamous epithelium is thin, flat, and disc-like polygonal cells, which are closely fitted. It is also known as pavement epithelium. Nuclei of this cell are flat and lie in the center of the cell. It lines Bowman's capsules of urinary tubules, terminal bronchioles, alveoli of lungs, blood vessels, lymph vessels, heart, and coelomic cavities. The columnar epithelium consists of elongated cells lying adjacent to each other like a column. The nucleus is an elongated lie at the variable position. It consists of a goblet epithelium which presence of mucus-secreting cells along with connective tissue therefore called a mucous membrane. Columnar epithelium lines stomach, intestine, gallbladder, pancreatic lobules. The ciliated epithelium consists of a cell bearing cilia on the surface. Cilia show rhythmic motion which creates current to transport materials. It is present on the surface of cuboidal and columnar epithelium which lines the oviduct, terminal bronchioles, the central canal of the spinal cord of the embryo. The pseudostratified epithelium is made up of single-layer columnar cells, but it appears two-layered because of the different sizes of the cell with nuclei at a different level.
So, the correct answer is Cuboidal.

Note: Epithelial tissue composed of mucopolysaccharides and glycoprotein which is secreted by a layer of collagen fiber. The cell of epithelial tissue held by interdigitation, desmosomes, tight junction, and intercellular bridges.