Extracellular Matrix Quiz

What is the primary function of the extracellular matrix (ECM)?

• To facilitate the passage of small molecules between cells

• To provide structural support to cells

• To act as the primary site of cellular respiration

• To replicate DNA

Which of the following components is NOT a major part of the extracellular matrix?

• Collagen

• Elastin

• Hemoglobin

• Fibronectin

What role does collagen play in the extracellular matrix?

• Acts as a signaling molecule to regulate cell division

• Provides elasticity to tissues

• Serves as the main structural protein giving strength and support

• Facilitates the transport of ions across the cell membrane

What is the role of proteoglycans in the extracellular matrix?

• To catalyze metabolic reactions

• To provide rigidity to the ECM

• To regulate the movement of molecules through the ECM

• To act as receptors for cell signaling

Fibronectin in the extracellular matrix primarily functions to:

• Store genetic information

• Bind and organize collagen fibers

• Act as an energy reserve

• Serve as a neurotransmitter

Elastin in the extracellular matrix is important for:

• Providing tensile strength

• Facilitating cell-cell communication

• Allowing tissues to return to their original shape after stretching or contracting

• DNA replication

The extracellular matrix can influence cell behavior by:

• Altering the pH of the cellular environment

• Directly participating in the Krebs cycle

• Mediating cell-matrix interactions through receptors

• Acting as a passive barrier to cell movement

Which of the following statements about the extracellular matrix (ECM) is FALSE?

• The ECM is a dynamic structure that can be remodeled by cells.

• All cells in multicellular organisms are in direct contact with the ECM.

• The ECM consists solely of proteins and carbohydrates.

• The ECM can store and present growth factors to cells.