Cell Biology: Transport through Cell Membrane Lecture 3

Membrane transport refers to the collection of mechanisms that regulate the passage of solutes such as ions and small molecules through biological membranes.

The cell membrane is selectively permeable.

Passive transport or diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration, down a concentration gradient.

<p>Diffusion allows cells to gain useful substances, obtain energy, grow, and get rid of waste products.</p> Signup and view all the answers

<p>1- Passive transport or diffusion, 2- Active transport</p> Signup and view all the answers

<p>The steepness of the concentration gradient, temperature, solubility of the substance, permeability of the cell membrane, thickness of the cell membrane, size of the molecule, size of the ions, and charge of the ions.</p> Signup and view all the answers

<p>Voltage-gated channels, ligand-gated channels, and mechanically gated channels.</p> Signup and view all the answers

<p>Facilitated diffusion.</p> Signup and view all the answers

<p>Osmosis.</p> Signup and view all the answers

<p>Bulk flow.</p> Signup and view all the answers