5.4 active transport

Question 1

Active transport

Answer 1

movment of molecules or ions into or out of cells from lower concentration to higher concentration

Question 2

Active transport across a membrnae mechanism

Answer 2

• molecule binds to the receptors in the carrier protein
• inside the cell ATP binds and is hydrolysed into ADP
• This cause the protein to change shape opening up the other side
• the phosphate molecule is released nd recombinds to foem ATP
• the carrier protein returns to its original shpe

its a selective process

Question 3

Bulk transport

Answer 3

for large molecules eg. enzymes and hormones via exo/endocytosis

Question 4

Endocytosis mechanism

Answer 4

transport bulk material into a cell.Phagocytosis for liquids and pinocytosis for liquids
1.a cell can suround the substance with a section of the plasm membrne
2.that membrane pinches off to form vesicle
3.this is a active process and requires ATP

Question 5

excoytosis