7.3- Cell Transport Flashcards

1
Q

Diffusion

A

process by which particles move from areas of high concentration to an area of low concentration

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2
Q

Facilitated Diffusion

A

process by which molecules cannot directly cross the membrane but can pass through special protein channels

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3
Q

Aquaporin

A

water channel proteins in the membrane which allow water to pass right through

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4
Q

Osmosis

A

the diffusion of water through a selective permeable membrane

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5
Q

Isotonic

A

“same strength” - concentrations of two liquids are equal

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6
Q

Hypertonic

A

“above strength” - the concentration that is higher than the other

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7
Q

Hypotonic

A

“below strength” - the concentration that is lower than the other

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8
Q

Osmotic Pressure

A

a force that will create the net movement of water out of or into a cell driven by differences in solute concentration

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9
Q

what is passive transport?

A

the movement of materials across a cell membrane without using cellular energy

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10
Q

What is active transport?

A

the movement of materials against a concentration difference that requires the use of cellular energy

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11
Q

endocytosis

A

“cell drinking”- process by which material is taken into the cell by means of infolding/pocketing of the cell membrane

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12
Q

exocytosis

A

release of large amount of material outside of the cell by fusing with either vacuole or vessicle and actively dumping out contents

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