$$ECM = \text{Ground Substance} + \text{Protein Fibers}$$

Question 1

Which of the following best describes the main components of the extracellular matrix (ECM) as shown in the image?

Accepted Answer

Ground substance and protein fibers

Question 2

Which type of protein fiber in the ECM provides resistance to tension and stretching forces?

Accepted Answer

Collagen fiber

Question 3

What is the primary function of glycosaminoglycans (GAGs) in the ground substance of the ECM?

Accepted Answer

To trap water and create a gel-like consistency

Question 4

Which ECM component forms a meshwork that supports cells, as indicated in the image?

Accepted Answer

Reticular fibers

Question 5

A patient with a genetic defect in collagen synthesis would most likely experience which of the following symptoms?

Accepted Answer

Increased tissue fragility and poor wound healing

Question 6

Which of the following best describes the role of proteoglycans in the ECM?

Accepted Answer

They bind to water, helping tissues resist compression.

Question 7

If the elastic fibers in the ECM were damaged, which tissue property would be most affected?

Accepted Answer

Ability to stretch and recoil

Question 8

Which of the following is NOT a component of the ground substance in the ECM as shown in the image?

Accepted Answer

Collagen fiber

Question 9

A tissue sample shows a high concentration of reticular fibers. Which function is this tissue most likely specialized for?

Accepted Answer

Providing a supportive framework for cells

Question 10

Which of the following best explains why the ECM is essential for tissue function?

Accepted Answer

It provides structural support, mediates cell signaling, and regulates the movement of molecules.

Question 11

If a mutation caused a loss of glycoproteins in the ECM, which process would be most directly affected?

Accepted Answer

Cell adhesion

Question 12

Which equation best represents the relationship between the components of the ECM?

Accepted Answer

$$ECM = 	ext{Ground Substance} + 	ext{Protein Fibers}$$

Introduction to Histology: The Four Primary Tissue Types

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