Transportation of materials through Plasma Membrane — Flashcards

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The plasma membrane is the outermost, extremely delicate, elastic membrane that separates cell contents from the external environment. It is called selectively permeable because it allows entry of cer…

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Osmosis is the movement of water from less solute concentration to more solute concentration across a membrane. Example: When dry raisins are kept in water, they swell because water moves from the bea…

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A marine fish will die if kept in fresh water because water will continuously enter the fish's body through osmosis (from low salt concentration outside to high salt concentration inside). The fish ca…

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The process by which materials spread equally throughout a medium like air or water without any external force. Examples: Smell of perfume spreading in a room, coffee powder dissolving in water, or co…

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Endosmosis: Water molecules enter the cell (egg in tap water swells). Exosmosis: Water molecules leave the cell (egg in salt water shrinks). Both processes depend on concentration gradients - water mo…

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1. Shape: Provides definite shape to cell contents. 2. Mechanical Barrier: Protects internal cell contents. 3. Selective Permeability: Controls entry and exit of substances. 4. Endocytosis: Enables ce…

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Saline solution has salt concentration similar to blood, preventing osmotic imbalance. If distilled water is given, water would enter blood cells through osmosis, causing them to swell and burst. Sali…

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Solute: The substance that gets dissolved (like sugar in sugar solution). Solvent: The medium in which solute dissolves (like water in sugar solution). Together they form a solution. The amount of sol…