WebSome molecules, such as carbon dioxide and oxygen, can diffuse across the plasma membrane directly, but others need help to cross its hydrophobic core. In facilitated … WebSome small molecules, such as water, can pass directly through the membrane through small gaps in between the phospholipids making up the lipid bilayer. Larger molecules, such as glucose, and charged partides, such as ions, cannot pass through these gaps.

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WebSep 16, 2024 · Lipid soluble substances can enter a cell by dissolving in the lipid portion of the membrane and diffusing through it. The greater the lipid solubility, the more readily … Webcell membrane The ___________ use energy to pick up specific molecules and carry them across the cell membrane. transport proteins Glucose enters a liver cell through a ___________ protein channel. facilitated diffusion A nerve cell uses energy to pump sodium out of its cytoplasm into a sodium-rich environment. active transport how to revamp your wardrobe

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WebSome molecules, such as carbon dioxide and oxygen, can diffuse across the plasma membrane directly, but others need help to cross its hydrophobic core. In facilitated diffusion, molecules diffuse across the plasma membrane with assistance from membrane proteins, such as channels and carriers. WebFeb 24, 2024 · Passive diffusion is the simplest pathway for molecules to cross the plasma membrane. Transport of molecules always takes place through membranes. In many living organisms, plasma or cell... WebDec 30, 2024 · Small polar molecules can sometimes pass easily (e.g. ethanol), but more often pass at low rates if at all (e.g. water). However, small nonpolar molecules are able to pass through the membrane with relative ease. The reasons should be self-evident: larger molecules simply cannot fit between the lipid molecules to make their way through. northeast passage unh