Textbook Question
Comment on the role of the sodium-potassium pump in maintaining a cell's resting membrane potential.
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2. Cell Chemistry & Cell Components
Types of Membrane Proteins
2:06 minutesProblem 2
Textbook Question
Where are protein components of the extracellular matrix synthesized?a. in the rough ERb. in the Golgi apparatusc. in the plasma membraned. in the extracellular layer itself
Verified step by step guidance1
Identify the main function of each organelle listed in the options.
Recall that the rough endoplasmic reticulum (ER) is involved in the synthesis of proteins, especially those that are secreted or membrane-bound.
Consider the role of the Golgi apparatus, which is primarily involved in modifying, sorting, and packaging proteins for secretion or use within the cell.
Understand that the plasma membrane is the boundary of the cell and not typically involved in the synthesis of proteins.
Recognize that the extracellular matrix is a structure outside the cell, and its components are synthesized inside the cell before being secreted.
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Video duration:
2mKey Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Extracellular Matrix (ECM)
The extracellular matrix is a complex network of proteins and carbohydrates that provides structural and biochemical support to surrounding cells. It plays a crucial role in tissue and organ function, influencing cell behavior, adhesion, and communication. Understanding the ECM is essential for grasping where its components are synthesized.
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Rough Endoplasmic Reticulum (Rough ER)
The rough endoplasmic reticulum is a type of endoplasmic reticulum studded with ribosomes, which are the sites of protein synthesis. It is primarily responsible for the production of proteins that are either secreted from the cell, incorporated into the cell's plasma membrane, or sent to an organelle. This makes the rough ER a key player in the synthesis of ECM proteins.
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Protein Synthesis Pathway
The protein synthesis pathway involves several cellular structures, including the rough ER, Golgi apparatus, and ribosomes. Proteins destined for the extracellular matrix are synthesized in the rough ER, modified in the Golgi apparatus, and then transported to their final location. Understanding this pathway is crucial for determining where ECM components are synthesized.
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