5 Questions
Which type of gating responds to changes in membrane electric potential, with a typical example being Na+ channels?
Voltage gating
What type of gating opens or closes when bound to an external ligand, such as a hormone, or an internal ligand, such as intracellular Ca++, cAMP, or G-protein?
Ligand gating
Which mechanism involves the passive transport of large molecules like glucose and amino acids, with the help of a carrier protein?
Facilitated diffusion
In facilitated diffusion, the carrier protein has a channel that is large enough to transport a specific molecule part-way but not all the way through the membrane. What happens to the molecule once it enters the channel?
It becomes bound to a specific receptor on the protein carrier
Which type of diffusion occurs with the concentration gradient and requires a carrier protein to facilitate the transport of specific molecules?
Facilitated diffusion
Test your knowledge on ion channel gating mechanisms and their response to changes in membrane potential and ligand binding. Explore examples such as Na+ channels and acetylcholine receptors. Learn about different types of channel junctions and their role in facilitating diffusion.
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