Histology: Epithelia and Glands Pt. 1
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Histology: Epithelia and Glands Pt. 1

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Questions and Answers

What are the 4 basic types of animal tissue?

Epithelia, connective tissue, muscle tissue and nervous tissue

What are epithelia?

Tissues consisting of closely apposed cells, without intervening intercellular substances

Epithelia are _____ but ______, and all grow on an underlying _____ of _____ _______ ______.

Epithelia are avascular but innervated, and all epithelia grow on an underlying layer of vascular connective tissue.

____, _____ and _____ diffuse from blood vessels in connective tissue.

<p>Oxygen, nutrients, metabolites</p> Signup and view all the answers

Connective tissue and epithelium are separated by a ______ _____.

<p>Basement membrane</p> Signup and view all the answers

What is epithelium called when it lines large intestinal body cavities?

<p>Mesothelium</p> Signup and view all the answers

What surfaces do epithelia cover?

<p>All free surfaces</p> Signup and view all the answers

Internal surfaces of what 2 vessels are lined by epithelia, and what are the epithelia called here?

<p>Blood and lymph vessels, and epitheliym is called endothelium.</p> Signup and view all the answers

Which is NOT a function of epithelia?

<p>Absorption of hormones released by the endocrine glands</p> Signup and view all the answers

Which tract can absorb nutrients from the digestive tract lumen (inside space of a tubular structure)?

<p>The gastrointestinal tract (GI tract)</p> Signup and view all the answers

Epithelial tissue lines the ____ _____, according to its function of excretion.

<p>excretory lumina</p> Signup and view all the answers

Epithelia are classified on the basis of _______ and _____.

<p>The number of cell layers, shape of the cells in the surface layer</p> Signup and view all the answers

If there is ONLY ONE layer of cells in the epithelium, it is classified as ___.

<p>Simple</p> Signup and view all the answers

If there are TWO OR MORE layers of cells it is called ___.

<p>Stratified</p> Signup and view all the answers

Cells in the surface layer are described according to their height as:

<p>All of the above</p> Signup and view all the answers

Identify this type of epithelium.

<p>Simple squamous</p> Signup and view all the answers

Identify this type of epithelium.

<p>Simple cuboidal</p> Signup and view all the answers

Identify this type of epithelium.

<p>Stratified squamous</p> Signup and view all the answers

Identify this type of epithelium.

<p>Simple columnar</p> Signup and view all the answers

Identify this type of epithelium.

<p>Stratified columnar</p> Signup and view all the answers

Identify this type of epithelium.

<p>Stratified cuboidal</p> Signup and view all the answers

Identify this type of epithelium.

<p>Pseudostratified columnar</p> Signup and view all the answers

What are the characteristics of simple squamous epithelial cells?

<p>Single layer, flattened</p> Signup and view all the answers

What is the appearance of the nuclei of the simple squamous epithelia

<p>Flattened and centrally located within cells</p> Signup and view all the answers

What are the functions of simple squamous epithelia in the cardiovascular system?

<p>Passive transport of fluids, nutrients and metabolites across capillary walls</p> Signup and view all the answers

What function does the simple squamous epithelium have in the lungs?

<p>Gas exchange or transport across capillaries and alveoli</p> Signup and view all the answers

What purpose does simple squamous epithelium serve in the peritoneal cavity?

<p>Reduction of friction between visceral organs by production of lubricating fluids and transport of fluids</p> Signup and view all the answers

What are some examples of simple squamous epithelium?

<p>Blood vessels, lungs, mesothelium, heart</p> Signup and view all the answers

The epithelial cell's nucleus is the THICKEST and most visible structure.

<p>True</p> Signup and view all the answers

What is transcytosis?

<p>Taking material from one side of a cell and transporting it in the form of a membrane-coated vesicle through the cell for its release on the other side of a cell.</p> Signup and view all the answers

Where can you find simple squamous epithelia?

<p>All of the above</p> Signup and view all the answers

What do the simple cuboidal epithelial cells look like?

<p>Single square-like layer</p> Signup and view all the answers

What are the characteristics of the nuclei present in simple cuboidal epithelia?

<p>Centrally located and spherical</p> Signup and view all the answers

What are the functions of the simple cuboidal epithelium?

<p>Secretion, protection (ducts), absorption and transport of filtered substances (kidney tubules)</p> Signup and view all the answers

What are some examples of where the simple cuboidal epithelia are found?

<p>Tubeless of kidney, follicles of thyroid, surfaces of ovaries, excretory ducts (canals) of many glands</p> Signup and view all the answers

Match the terms with the characteristics of the simple columnar epithelium.

<p>Cells = Tall, single-layered Nuclei = Basally located and spherical Gastrointestinal tract (cardiac of stomach to rectum) = Examples Functions = Absorption, protection, secretion of mucus</p> Signup and view all the answers

What are goblet cells?

<p>Cells that secrete mucin and create a protective mucus layer.</p> Signup and view all the answers

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