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cell structure > cell transport > Flashcards

cell transport Flashcards

1
Q

What is permeable

A

Allows all substances in and out

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2
Q

What is semi permeable

A

Allows some substances in and out

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3
Q

What is impermeable

A

Does not allow substances to move through it

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4
Q

What are the two types of movement

A

Active transport
Diffusion

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5
Q

What is active transport

A

The movement of molecules from areas of low concentration to areas of higher concentration active transport requires energy

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6
Q

Why does active transport use energy

A

Uses energy to take chemicals into a cell against the concentration gradient

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7
Q

Examples of active transport

A

Cells taking up glucose
Plants taking up minerals from the soil

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8
Q

What is diffusion

A

The movement of molecules from areas of high concentration to areas of lower concentration
Diffusion is a passive process

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9
Q

What is an example of diffusion

A

Diffusion of gases in leaves/ animal cells

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10
Q

What is osmosis

A

The movement of water from an area of height water concentration to an area of lower water concentration across a semi permeable membrane

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11
Q

What is isotonic

A

Means two solutions have the same solute concentration

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12
Q

What would happen is a cell is placed in an isotonic solution

A

If an animal cell is surrounded by an isotonic solution water will move in and out at the same rate and the cell will remain intact

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13
Q

What is osmoregulation

A

When our kidneys make sure the fluid in our bodies that surrounds our cells has a stable concentration

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14
Q

What is hypotonic

A

Means a solution has a lower solute concentration than another solution

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15
Q

What would happen is an animal cell is placed in a hypotonic solution

A

Water will move into the cell and may cause it to burst (lysis)

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16
Q

What is an amoeba

A

A single celled organism that lives in freshwater pools and ponds

17
Q

How does amoeba control osmosis

A

Has a contractile vacuole

18
Q

What is hypertonic

A

Means a solution has a higher solute concentration than another solution

19
Q

What would happen if an animal cell was in a hypertonic solution

A

Water will move out of the cell and may cause it to shrivel up and die (crenate)

20
Q

How do roots absorb water

A

If the plant cell is surrounded by a less concentrated solution then water will move into the cytoplasm and vacuole of the plant cells

21
Q

What is turgor or turgor pressure

A

Is the pressure of the cytoplasm and vacuole against the cell wall of a plant

22
Q

What would happen to plants without turgor pressure

A

They would wilt

23
Q

What is plasmolysis

A

Is the loss of water from the cytoplasm and the movement of the membrane away from the cell wall

cell structure (3 decks)

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