Question

5) Which is the following is not a characteristic of squamous epithelium? [ ]
A)flattened cell
B) single layer of cells
c) Adopted to facilitatethe diffusion of substances
d) contain microvilli​

Answer 1

Answer:

Epithelial cells are held together by tight junctions, adhering junction and desmosomes and attach to a specialized form of extracellular matrix called the basement membrane. Epithelial cells are polarized with an apical surface facing the lumen or external environment and a basal surface facing the basement membrane.

Explanation:

Characteristics of Epithelial Tissues

1 Covers and lines body surfaces.

2 Cells are densely packed together with minimal amount of intercellular substance.

3 Cells are firmly attached by intercellular junctions.

4 Cells rest on a basement membrane partly derived from underlying connective tissue.

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Answer 2

Contain microvilli​ is not a characteristic of squamous epithelium

Explanation:

• Option (D) Contain microvilli​ is correct answer. It is not a characteristic of squamous epithelium.
• Every individual unit is covered in simple columnar epithelium.
• Microvilli are small spikes on the outer surface of these cells that are specialized for absorption (absorptive cells).
• Option (A) flattened cell is a characteristic of squamous epithelium.
• Squamous (flattened) epithelial cells are organized in layers upon a basal membrane in a stratified squamous epithelium.
• The basal layer is only in contact with one layer; the other layers attach to one another to preserve structural integrity.
• The cells in the deeper levels might be columnar or cuboidal.
• Option (B) single layer of cells is a characteristic of squamous epithelium.

• Basic epithelia is epithelium made up of a single layer of cells; stratified epithelia is epithelial tissue made up of many layers.
• Option (C) Adopted to facilitate the diffusion of substances is  a characteristic of squamous epithelium.
• An epithelial tissue formed of more than one layer of epithelial cells is known as a stratified epithelium.
• A stratified squamous epithelium is a stratified epithelium with squamous (flattened and scale-like) epithelial cells in the top layer.
• Cuboidal or columnar cells may be seen in the deeper layers.