3. Movement In And Out Of Cells Flashcards

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1
Q

Diffusion

A

This is the net movement of molecules from a region of high concentration to a region of low concentration, down the concentration gradient

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2
Q

Factors affecting diffusion

A

Larger concentration gradient
Higher temperature
Smaller molecule surface ares

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3
Q

Osmosis

A

Movement of water molecules from their region of high concentration to a region of their low concentration through a semi permeable membrane

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4
Q

Concentration in Osmosis

A

Conc. of solute outside the cell > conc. inside = Cell shrinks (Plasmolysis)
Conc. of solute outside the cell < conc. inside = Cell grows (Turgid)

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5
Q

Osmosis in Animals

A

Increasing solute conc. inside the cell can cause the cell to burst due to too much water

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6
Q

Osmosis in Plants

A

Increasing solute concentration inside the cell causes the cell to become turgid
Decreasing solute concentration inside the cell causes it to become flaccid

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7
Q

Active Transport

A

Movement of particles through a cell membrane, from a region of lower concentration to a region of higher concentration, against the concentration gradient
This is done using energy from respiration (ATP)

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8
Q

Tonicity

A

The ability of a solution to affect the fluid volume and pressure in a cell

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9
Q

Homogenous

A

When you can’t differentiate the solvent and solute in a solution

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10
Q

Isotonic Solution

A

Solutions that have identical osmotic pressures

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11
Q

Hypotonic Solutions

A

A solution where the solute concentration is low enough to cause water to move into cells

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12
Q

Hypertonic Solution

A

A solution whose solute concentration is high enough to cause water to leave the cells

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