Active transport Flashcards

(12 cards)

1
Q

What is active transport?

A

The movement of particles from a low to an area of high concentration, using energy from respiration and a carrier protein

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2
Q

Why do cells use active transport?

A

To take in substances that are in lower concentration outside than inside the cell

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3
Q

Where does the energy from active transport come from?

A

Aerobic respiration from the mitochondria

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4
Q

What are carrier proteins?

A

Proteins in the cell membrane that use energy to move molecules into and out of a cell

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5
Q

How do root hair cells take in nitrate ions?

A

Using active transport through carrier proteins that change shape and push ions into the cell using energy

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6
Q

What would normally happen if a substance is more concentrated inside than outside the cell?

A

It would diffuse out of the cell.

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7
Q

Why doesn’t diffusion work for nitrate uptake in plants?

A

Because nitrate concentration is higher inside the root hair cell, so diffusion would move them out instead of in.

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8
Q

What changes in the carrier protein to move ions?

A

Its shape, using energy from respiration.

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9
Q

What happens to potato strips in distilled water?

A

They get longer

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10
Q

Why do potato strips in distilled water get longer?

A

Water enters the cells by osmosis since the water concentration is higher outside.

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11
Q

What happens to potato strips in a concentrated solution?

A

They get shorter

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12
Q

Why do potato strips in a concentrated solution get shorter?

A

Water leaves the cells by osmosis since the water concentration is lower outside.

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