Human Anatomy
Human Anatomy
9th Edition
ISBN: 9780135168059
Author: Marieb, Elaine Nicpon, Brady, Patricia, Mallatt, Jon
Publisher: Pearson Education, Inc.,
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Chapter 4, Problem 1CYU

Describe the location of the apical region of an epithelial tissue. How can this region be easily identi�ed in a micrograph?

Expert Solution & Answer
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Summary Introduction

To review:

The apical surface of an epithelial tissue and its identification in a micrograph.

Introduction:

The epithelial tissue is a lining of cells covering body surfaces and cavities. The cells forming the epithelial tissue are closely bound together through specialized intercellular junctions. This tissue performs various functions such as protection, filtration, diffusion, secretion, absorption, and sensory reception. It rests upon a layer of connective tissue that provides nutritional support.

Explanation of Solution

A characteristic feature of epithelial cells is their polarization into apical and basal region which are distinguished on the basis of their position. The protein composition and function of apical and basal membrane varies and the tight junctions prevent the free passage of molecules between adjacent cells.

The apical region of an epithelial tissue is present at the top of the epithelial tissue and is directly exposed to the external environment. In simple epithelial tissue composed of a single layer of cells, the apical region of the cell faces toward the lumen or the external environment and the basal region sits on a layer of connective tissue. The stratified epithelium is composed of multiple layer of cells in which the apical region of topmost layer is exposed to the external environment and the basal region of the bottom layer rests on the connective tissue.

In a micrograph, the apical region of an epithelial tissue is identified as the region exposed to an empty space.

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Chapter 4 Solutions

Human Anatomy

Ch. 4 - Distinguish the matrix of a connective tissue from...Ch. 4 - Which structural element of connective tissue...Ch. 4 - How does loose connective tissue differ from dense...Ch. 4 - Which type of connective tissue forms the...Ch. 4 - Which connective tissues contain collagen �bers?Ch. 4 - In which connective tissues are the cells located...Ch. 4 - Prob. 17CYUCh. 4 - Look at a photomicrograph of smooth muscle tissue...Ch. 4 - Which nerve cells function to transmit electrical...Ch. 4 - Distinguish between the terms striated and...Ch. 4 - Which tissues regenerate easily? Which tissues do...Ch. 4 - Is the scar tissue that creates a "scar" located...Ch. 4 - What causes the heat and swelling in an infected...Ch. 4 - Which embryonic layer or layers form epithelium?Ch. 4 - How do cancerous cells differ from other highly...Ch. 4 - An epithelium that has several cell layers, with...Ch. 4 - The type of gland that secretes products such as...Ch. 4 - Match the epithelial type named in column B with...Ch. 4 - ln connective tissue proper, the cell type that...Ch. 4 - Identify each of the cell surface features...Ch. 4 - Match each epithelial tissue in column B with its...Ch. 4 - For each connective tissue (CT) listed, indicate...Ch. 4 - The muscle tissue that is striated is (a) skeletal...Ch. 4 - Neuroglia (a) conduct electrical impulses, (b) are...Ch. 4 - Which of the following cells are not found.in a...Ch. 4 - The ground substance in connective tissue proper...Ch. 4 - Prob. 12RQCh. 4 - Prob. 13RQCh. 4 - Prob. 14RQCh. 4 - Prob. 15RQCh. 4 - Prob. 16RQCh. 4 - Prob. 17RQCh. 4 - Name the speci�c type of connective tissue being...Ch. 4 - Name the four classic symptoms of inflammation,...Ch. 4 - Prob. 20RQCh. 4 - Prob. 21RQCh. 4 - Of the four basic tissue types, which two develop...Ch. 4 - Prob. 23RQCh. 4 - Prob. 24RQCh. 4 - Prob. 25RQCh. 4 - Prob. 26RQCh. 4 - Prob. 1CRCAQCh. 4 - Prob. 2CRCAQCh. 4 - Three patients in an intensive care unit have...Ch. 4 - Prob. 4CRCAQCh. 4 - A patch of scar tissue that forms in the wall of...Ch. 4 - Ciliated epithelium is located in the bronchial...
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