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Physiology 2022: Membrane Transport

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Questions and Answers

What is the primary function of the plasma membrane?

To generate energy for the cell
To facilitate the transport of molecules across the cell
To synthesize proteins for the cell
To define the extent of the cell (correct)

What is the term for the carbohydrate chains attached to integral proteins?

Lipid bilayer
Glycocalyx (correct)
Glycolipid
Glycoprotein

Which type of protein is attached to the membrane surface?

Transmembrane proteins
Integral proteins
Peripheral proteins (correct)
Lipid proteins

What is the structure of the plasma membrane composed of?

A bilayer of phospholipids with embedded proteins (C) Signup and view all the answers

What is the function of peripheral proteins in the plasma membrane?

To provide support to the plasma membrane from the cytoplasmic side (C) Signup and view all the answers

What is the main characteristic of simple diffusion?

Movement of molecules down their concentration gradient (A) Signup and view all the answers

What is the primary function of facilitated diffusion?

To move molecules down their concentration gradient through an integral protein (D) Signup and view all the answers

What is required for active transport to occur?

ATP as an energy source (A) Signup and view all the answers

What is the term for the diffusion of water molecules across a membrane?

Osmosis (B) Signup and view all the answers

What is the type of transport where molecules move directly through the phospholipid bilayer?

Simple diffusion (D) Signup and view all the answers

What is the purpose of the integral protein in facilitated diffusion?

To enable the passage of a particular solute across the membrane (C) Signup and view all the answers