Active transport

Question 1

What is active transport?

Answer 1

The transport of substances against the concentration gradient, from low to high concentration

Question 2

How does active transport work?

Answer 2

• The ion goes onto a certain site on the carrier protein, and the ATP is hydrolysed into a phosphate group and ADP.
• The energy from the ATP is used to change the proteins shape and so the ion goes to the other side.
• The phosphate is released and joins to an ADP in the mitochondria to make ATP

Question 3

Is active transport passive or active?

Answer 3

Active

Question 4

Does active transport use ATP?

Answer 4

Yes

Question 5

What is exocytosis?

Answer 5

A large substance exiting the cell in bulk

Question 6

What is endocytosis?

Answer 6

A large substance entering the cell in bulk

Question 7

What is phagocytosis?

Answer 7

When solid matter is taken into the cell

Question 8

What is pinocytosis?

Answer 8

When liquid matter is taken into the cell

Question 9

How does exocytosis work?

Answer 9

The particles move from a vesicle on the

cytoskeleton by the motor proteins to the plasma membrane which fuses to the vesicle and releases the particles

Question 10

How does endocytosis work?

Answer 10

The particles move close to the cell, the plasma membrane extends around the cell, the sides that move extend are pseudopods. The 2 sides join, enclosing the substance in a vesicle.

Question 11

How does exocytosis use ATP?

Answer 11

ATP is used when the motor proteins move the vesicle on the cytoskeleton.
ATP is used when the 2 membranes fuse together

Question 12

How does endocytosis use ATP?

Answer 12

ATP is used when the motor proteins move the vesicle on the cytoskeleton to enter the cell. and when the psuedopods fuse

Question 13

What are examples of active transport?

Answer 13

Uptake glucose and amino acids in the small intestine
Absorbing mineral ions in root hair cell
Exchange of hydrogen and urea in the kidney
Exchange of sodium and potassium ion in muscle cells