Active transport

Question 1

Active transport

Answer 1

The active movement of substances from a low concentration to a higher concentration (up their concentration gradient) with the use of energy in the form of ATP.

Question 2

Give an example of Active transport

Answer 2

Sugar absorption in the gut

Mineral absorption in plants

Question 3

The main factors that affect the rate if Active transport

Answer 3

• The surface area of cell membranes.

- The number of carrier proteins in cell membranes.

Question 4

Co-transport

Answer 4

A method of membrane transport where two substances are both transported across a membrane at the same time either in the same direction or opposite directions.

Question 5

How are sodium ions actively transported in the blood?

Answer 5

By Sodium-potassium ATPase from the inside of epithelial cells lining the ileum.

Question 6

Is the concentration so Sodium ions higher or low inside the cell?

Answer 6

Lower in the inside than the outside

Question 7

Which ion binds to cotransporter proteins to transport glucose into the epithelial cells in the ileum?

Answer 7

Sodium ions

Question 8

How many Na+ ions from the lumen of the ileum bind to the sodium-glucose cotransporter?

Answer 8

2 sodium ions

Question 9

Which of the following processes does NOT happen via active transport?

Answer 9

Movement of water up xylem vessles

Question 10

What ion is co-transported into the ileum with glucose/ amino acids?

Answer 10

Sodium ions