Epithelial Tissue

Epithelial tissue primarily functions in covering surfaces of the body, lining hollow organs and cavities, and forming glands. The incorrect options do not accurately describe the functions of epithelial tissue.

Epithelial tissue is avascular, meaning it does not contain blood vessels, but it does contain nerve endings.

Tight junctions, gap junctions, desmosomes, hemidesmosomes, and adherens junctions are the specific types of cell junctions responsible for holding epithelial cells together. Nexus junctions, strand junctions, and ring junctions are not recognized as legitimate names for cell junctions involved in cell adhesion.

The Basement Membrane is specifically responsible for supporting the epithelium, providing a surface for cell migration, and acting as a physical barrier. The incorrect answers are not functions of the Basement Membrane.

The correct answer describes the basal lamina and reticular lamina, which are the two main components of the basement membrane. The incorrect answers provided do not accurately describe the components of the basement membrane or their functions.

Tissue is specifically defined as a group of cells with a common origin and specialized function, ruling out the definitions provided in the incorrect answers.

Cell junctions refer to the contact points between plasma membranes of adjacent tissue cells, allowing for communication and coordination between cells.

The correct answer includes Covering & Lining Epithelia and Glandular Epithelia as the two types of Epithelial Tissue. The incorrect answers provided do not accurately represent the types of Epithelial Tissue.

Covering and Lining Epithelia is the type of epithelial tissue that covers and protects various structures in the body, including the skin and internal organs. It also lines the interior of various systems like the respiratory, digestive, urinary, and reproductive systems.

Glandular epithelia are specialized epithelial cells that secrete substances into the glandular lumen or ducts.

Stratified tissue refers to tissue with two or more layers of cells stacked on top of each other, while pseudostratified tissue appears to have multiple layers due to the varying heights of its cells, though all cells actually touch the basement membrane. The incorrect answers provided in the multiple-choice options aim to confuse by stating the opposite or providing irrelevant information about the two types of tissues.

Columnar cells are taller than they are wide, providing more surface area for absorption and secretion.

Squamous cells are flat, while cubodial cells are cube-shaped, columnar cells are tall and rectangular, and transitional cells can change shape depending on the tissue they are found in.

The correct answer is Simple Squamous because it is the type of epithelial cell that lines the cardiovascular system and is known as endothelium. It is present at sites of filtration, diffusion, and secretion but not wear and tear.

Simple Cuboidal epithelial cells are cube-shaped cells that are involved in secretion and absorption in various tissues.

Epithelial tissue is characterized by closely packed cells with little to no extracellular matrix, whereas connective tissue has widely scattered cells surrounded by a large amount of extracellular matrix. Muscle tissue consists of muscle fibers and nervous tissue is made up of neurons, both of which have different structural compositions compared to epithelial and connective tissues.

Epithelial tissues typically line the cavities and surfaces of blood vessels to protect them and allow substances to pass through. In contrast, muscle tissues, nervous tissues, and connective tissues do not cover epithelial tissues as they have different functions in the body.