Active Transport Pg.19

Question 1

Sometimes substances need to be absorbed from a lower concentration to a higher concentration - against the _________ ________. This process is called active transport.

Answer 1

Concentration gradient.

Question 2

Root hairs take in _________ and ________.

Answer 2

Minerals and water.

Question 3

Plant roots are covered in _______ of root hair cells.

Answer 3

Millions.

Question 4

These cells _____ ____ into the soil.

Answer 4

Stick out.

Question 5

These hairs give the roots a ______ _______ ______.

Answer 5

Large surface area.

Question 6

This is useful for absorbing water and _________ ____ from the soil.

Answer 6

Mineral ions.

Question 7

Plants need mineral ions for ________ _______.

Answer 7

Healthy growth.

Question 8

Root hairs take in minerals using ________ ________.

Answer 8

Active transport.

Question 9

The concentration of minerals is usually ________ in the root hair cells than in the soil around them.

Answer 9

Higher.

Question 10

So the root hair cells can’t use ________ to take up minerals from the soil. They use active transport instead.

Answer 10

Diffusion.

Question 11

Active transport allows the plant to absorb minerals from a very ______ solution in the soil - it moves the minerals against the _______ _______.

Answer 11

Dilute.
Concentration gradient.

Question 12

But active transport needs energy from _________ to make it work.

Answer 12

Respiration.

Question 13

We need active transport to stop us _________.

Answer 13

Starving.

Question 14

The body needs to absorb _______ (e.g. glucose and amino acids) from ______ to survive.

Answer 14

Nutrients.
Food.

Question 15

The nutrients have to move from the ____ into the blood.

Answer 15

Gut.

Question 16

When there’s a higher concentration of nutrients in the gut, they _______ into the blood.

Answer 16

Diffuse.

Question 17

Sometimes there’s a ______ concentration of nutrients in the gut than there is in the blood.

Answer 17

Lower.

Question 18

The body uses active transport to move the nutrients (like glucose) from a lower concentration in the _____ to a higher concentration in the _____.

Answer 18

Gut.
Blood.

Question 19

This means _____ can be taken into the blood ______ the concentration gradient. The glucose is then transported to ______, where it’s used for _________.

Answer 19

Glucose.
Against.
Cells.
Respiration.

Question 20

What’s the purpose of active transport in the gut?

Answer 20

Active transport allows nutrients such as glucose to move from a lower concentration in the gut to a higher concentration in the blood (against the concentration gradient).