Key Area 2- Transport across cell membranes Flashcards

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1
Q

What are phospholipids?

A

Molecules that make up the cell membrane with proteins

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2
Q

What is passive transport?

A

Movement of molecules down a concentration gradient that requires no energy

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3
Q

What does turgid mean?

A

A plant cell has filled with water

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4
Q

What does plasmolysed mean?

A

A plant cell that has shrunk as water has moved out of it

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5
Q

What is active transport?

A

The movement of molecules against the concentration gradient that requires energy

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6
Q

Definition of diffusion

A

The movement of molecules from higher concentration to lower concentration, down a concentration gradient

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7
Q

Definition of osmosis

A

The movement of water from higher water concentration to lower water concentration, through a selectively permeable membrane

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8
Q

What are cell membranes made of?

A

Phospholipids and proteins

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9
Q

What can pass through the cell membrane?

A

Water, glucose, carbon dioxide, oxygen

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10
Q

What can’t pass through the cell membrane?

A

starch, sucrose

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11
Q

What does shrink mean?

A

A animal cell that has shrunk because water has moved out of the cell

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12
Q

What does bursts means?

A

A animal cell has burst because water has moved into the cell

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13
Q

What are the two types of passive transport?

A

Diffusion and osmosis

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14
Q

What is the term used to describe the cell membrane?

A

Selectively permeable

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