Cell transport

Question 1

what uses ATP and what doesn’t?

Answer 1

Active transport vesicles and carrier proteins use ATP while diffusion doesn’t

Question 2

Concentration gradient active Vs. passive?

Answer 2

Active transport moves against the concentration gradient. passive moves along the concentration gradient

Question 3

What’s simple and net diffusion?

Answer 3

process resulting from the random movement of molecules. Net diffusion is a process that distributes molecules evenly, high concentration to low concentration. (overall movement)

Question 4

Osmosis?

Answer 4

diffusion of water across a differently permeable membrane, this occurs so there is an even concentration.
Water moves through special channels called aqua pore.

Question 5

Facilitated transport?

Answer 5

requires special proteins in the cell membrane, either channel or carrier proteins, passive/active transport
water soluble molecules pass through channels so they don’t come in contact with the hydrophobic tails

Question 6

What are protein channels?

Answer 6

water soluble molecules pass through protein channels, facilitated diffusion. create a path for hydrophilic particles to not come in contact with hydrophobic inner portion. small in diameter ion/water get through

Question 7

carrier proteins?

Answer 7

transport molecules one sided membrane travel uses ATP.
- when the substance binds with a specific binding point within the protein it changes shape and opens up the the other side
- carriers can become saturated - when all of the carrier proteins are full
- carriers are specific
- carriers are regulated by substances such as hormones

Question 8

vesicular transport?

Answer 8

uses vesicles as transport. you have endocytosis, taking liquids/solids into the cell, the vesicle forms around liquid and pinches off known as pinocytosis and solids its phagocytosis. When vesicles exit its exocytosis.