.How do potassium ions primarily enter animal cells?a.Active transport by sodium-potassium pumpb.Passive diffusion through the lipid bilayerc.Facilitated diffusion through channel proteins
Question
.How do potassium ions primarily enter animal cells?a.Active transport by sodium-potassium pumpb.Passive diffusion through the lipid bilayerc.Facilitated diffusion through channel proteins
Solution
Potassium ions primarily enter animal cells through facilitated diffusion through channel proteins. Here's a step-by-step explanation:
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Potassium ions are positively charged and cannot pass directly through the negatively charged lipid bilayer of the cell membrane.
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Instead, they rely on a process called facilitated diffusion, which is a type of passive transport that does not require energy.
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In facilitated diffusion, substances move down their concentration gradient, from an area of high concentration to an area of low concentration.
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This process is facilitated by channel proteins embedded in the cell membrane. These proteins provide a hydrophilic passageway for the potassium ions to pass through.
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One such channel protein is the potassium ion channel. This channel is selective and only allows potassium ions to pass through.
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When the potassium ion channel opens, potassium ions flow into the cell, moving from an area of higher concentration outside the cell to an area of lower concentration inside the cell.
So, the primary method by which potassium ions enter animal cells is through facilitated diffusion via channel proteins.
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