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Questions and Answers
Which type of molecules can diffuse freely across membranes?
Which type of molecules can diffuse freely across membranes?
- Charged ions
- Large polar molecules
- Large uncharged molecules
- Small uncharged molecules (correct)
What is the major difference between channels and carrier proteins in facilitated diffusion?
What is the major difference between channels and carrier proteins in facilitated diffusion?
- Channels transport two molecules, while carrier proteins transport one molecule
- Channels form pores, while carrier proteins undergo a conformational change (correct)
- Channels require energy (ATP), while carrier proteins do not
- Channels are highly specific to their solute, while carrier proteins are not
What is the function of symporters in facilitated diffusion?
What is the function of symporters in facilitated diffusion?
- Transport two molecules in the same direction (correct)
- Transport charged ions
- Transport only large polar molecules
- Transport two molecules in opposite directions
What is the specificity of aquaporins in facilitated diffusion?
What is the specificity of aquaporins in facilitated diffusion?
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What are the things that open the channel?
What are the things that open the channel?
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What is the main energy storage molecule and its charge?
What is the main energy storage molecule and its charge?
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What converts a chemical signal into the cell for Na+, K+ and Ca2+?
What converts a chemical signal into the cell for Na+, K+ and Ca2+?
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What causes depolarization in cell membranes?
What causes depolarization in cell membranes?
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What is the function of aquaporins?
What is the function of aquaporins?
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What is the role of voltage-gated sodium channels?
What is the role of voltage-gated sodium channels?
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What is the function of transient receptor potential cation channel subfamily V member 1 (TrpV1)?
What is the function of transient receptor potential cation channel subfamily V member 1 (TrpV1)?
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What allows potassium ions to pass but blocks smaller sodium ions?
What allows potassium ions to pass but blocks smaller sodium ions?
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