Movement in and out of cells (2.1-2.2)

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Respiration supplies energy

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23 Terms

1

Respiration supplies energy

________ to drive carrier protein across membrane.

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2

Molecules

________ and ions in liquids or a gas move continuously and randomly and so they change direction as they bump into eachother.

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3

Gas exchange

________ in the alveoli of lungs takes place by diffusion.

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4

Temprature on diffusion

________: An increase in temperature will increase the rate of diffusion; Molecules gain kinetic energy and so will move faster (faster diffusion)

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5

Osmosis

________: The net movement of water molecules from a solution of high water potential to a solution of low water potential (down a water potential gradient) across a partially permeable.

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6

Diffusion

________: the net movement of molecules within a gas or liquid from a region of high concentration to a region of low concentration (down a concentration gradient) across a semi permeable membrane, until equilibrium is reached.

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7

solution of low water

When it is immersed in a(n) ________ potential: the cell loses water.

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8

Concentration gradient in diffusion

________: The higher the difference in concentrations the faster the rate of diffusion.

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9

Active transport

________: the movement of molecules from a region of LOWER concentration to a region of HIGHER concentration (against a concentration gradient)

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10

plant cell

When a(n) ________ is placed in a solution of low water potential: water leaves the the cell.

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11

Gas exchange

________ through the stomata of the leaves occurs by diffusion.

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12

Diffusion

the net movement of molecules within a gas or liquid from a region of high concentration to a region of low concentration (down a concentration gradient) across a semi permeable membrane, until equilibrium is reached

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13

Concentration gradient

The higher the difference in concentrations the faster the rate of diffusion

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14

Temprature

An increase in temperature will increase the rate of diffusion; Molecules gain kinetic energy and so will move faster (faster diffusion)

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15

Surface area of the membrane

Larger surface area of the membrane the higher the rate of diffusion

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16

Distance over which diffusing molecules travel

Shorter the distances faster the rate of diffusion

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17

Size of diffusing molecules

Smaller/lighter molecules will move faster and so will have a higher rate of diffusion

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18

Osmosis

The net movement of water molecules from a solution of high water potential to a solution of low water potential (down a water potential gradient) across a partially permeable

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19

When a plant cell is placed in a solution of low water potential

water leaves the the cell

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20

When it is placed in a solution of high water potential

water enters the cell

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21

When it is immersed in a solution of low water potential

the cell loses water

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22

When it is immersed in a solution of high water potential

the cell takes in water

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23

Active transport

the movement of molecules from a region of LOWER concentration to a region of HIGHER concentration (against a concentration gradient)

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