Active Transport Pg.19 Flashcards
Sometimes substances need to be absorbed from a lower concentration to a higher concentration - against the _________ ________. This process is called active transport.
Concentration gradient.
Root hairs take in _________ and ________.
Minerals and water.
Plant roots are covered in _______ of root hair cells.
Millions.
These cells _____ ____ into the soil.
Stick out.
These hairs give the roots a ______ _______ ______.
Large surface area.
This is useful for absorbing water and _________ ____ from the soil.
Mineral ions.
Plants need mineral ions for ________ _______.
Healthy growth.
Root hairs take in minerals using ________ ________.
Active transport.
The concentration of minerals is usually ________ in the root hair cells than in the soil around them.
Higher.
So the root hair cells can’t use ________ to take up minerals from the soil. They use active transport instead.
Diffusion.
Active transport allows the plant to absorb minerals from a very ______ solution in the soil - it moves the minerals against the _______ _______.
Dilute.
Concentration gradient.
But active transport needs energy from _________ to make it work.
Respiration.
We need active transport to stop us _________.
Starving.
The body needs to absorb _______ (e.g. glucose and amino acids) from ______ to survive.
Nutrients.
Food.
The nutrients have to move from the ____ into the blood.
Gut.
When there’s a higher concentration of nutrients in the gut, they _______ into the blood.
Diffuse.
Sometimes there’s a ______ concentration of nutrients in the gut than there is in the blood.
Lower.
The body uses active transport to move the nutrients (like glucose) from a lower concentration in the _____ to a higher concentration in the _____.
Gut.
Blood.
This means _____ can be taken into the blood ______ the concentration gradient. The glucose is then transported to ______, where it’s used for _________.
Glucose.
Against.
Cells.
Respiration.
What’s the purpose of active transport in the gut?
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).
