(d) ACTIVE TANSPORT the movemnt of particles

What is active transport

Movement of molecules o ions into or out of a cel from a region of lower concentration to higher concentration

What does active transport require

Energy (supplied by ATP)

Carrier protein (act s pumps as they span across the membrane)

What is the first step

Molecules or ions that are o be transported bind to receptors on carrier proteins on the outside

What happens on the inside with ATP

ATP binds to carrier protein and it becomes hydrolysed to form ADP and phosphate

What does the phosphate and Carrier protein do?

Causes Protein changes shape and opens up he inside of the cell which allows molecules or ions to be released into the cell

What happens after the molecules or ions get released into the cell?

Phosphate molecule is released from the carrier protein and goes from ADP back to ATP and carrier proteins go back to original shape

Active transport is a —- process

Selective

Specific substances are transported by specific carrier proteins

What is it called when molecules are too large to be transported by carrier or channel proteins

Bulk transport (THATS what happens instead)

What are the 2 types of endpcytosis called?

Phagocytosis - solids

Pinocytosis - liquids

How does endpcytosis occur?

Plasmammebrane bends inwards when in contact with the material

Enfolds material until it infuses and forms a vesicle

Vesicle moves into cytoplasm for transfer for further processing

What happens during exocytosis

Reverse

Vesicles fuse with the plasmamembrane and the contents of the vesicles released outside the cell