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Questions and Answers
Which type of gating responds to changes in membrane electric potential, with a typical example being Na+ channels?
Which type of gating responds to changes in membrane electric potential, with a typical example being Na+ channels?
- Ligand gating
- Voltage gating (correct)
- Channel gating
- Facilitated diffusion
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?
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 (correct)
- Channel gating
- Facilitated diffusion
- Voltage gating
Which mechanism involves the passive transport of large molecules like glucose and amino acids, with the help of a carrier protein?
Which mechanism involves the passive transport of large molecules like glucose and amino acids, with the help of a carrier protein?
- Voltage gating
- Channel gating
- Ligand gating
- Facilitated diffusion (correct)
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?
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?
Which type of diffusion occurs with the concentration gradient and requires a carrier protein to facilitate the transport of specific molecules?
Which type of diffusion occurs with the concentration gradient and requires a carrier protein to facilitate the transport of specific molecules?
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