Types of cell tansportation

Question 1

passive transport

Answer 1

no energy is required as it moves down the concentration gradient

Question 2

active transport (short answer)

Answer 2

requires energy as it moves up the concentration gradient

Question 3

what are the passive types of transport

Answer 3

• diffusion
• osmosis
• carrier mediated
• facilitated discussion

Question 4

what are the active types of transport

Answer 4

• active transport
• vesicular transport
• endocytosis
• exocytosis

Question 5

what is a simple diffusion

Answer 5

when molecules can pass through the lipid layer or through the channel proteins

Question 6

what are some examples of molecules that can pass through the lipid layer (simple diffusion)

Answer 6

• alcohol
• steroids
• fatty acids
• oxygen
• carbon dioxide

Question 7

what are some examples o molecules that can pass through the channel protein (simple diffusion)

Answer 7

• Na
• Ca
• Cl
• water

Question 8

what is carrier-mediated transport?

Answer 8

• proteins in the cell membrane bind to molecules to be transported across the membrane
• carrier proteins are specific, for example, glucose carriers will not carry other sugars. They can become saturated and the activity is regulated by hormones.

Question 9

what is facilitated diffusion

Answer 9

the molecule to be transported attaches to a binding site on the carrier protein. The carrier protein changes shape and is released on the other side of the membrane.

Question 10

what is active transport (long answer)

Answer 10

the molecule to be transported attaches to a binding site on the carrier protein. The carrier protein changes shape and is released against the concentration gradient (low to high)

Question 11

what is osmosis

Answer 11

osmosis is the diffusion of water across a selectively permeable membrane from a region of high water concentration to an area of low water concentration.

Question 12

what is a vesicular transport

Answer 12

is the movement of substances across the cell membrane in membranous bags called vesicles

Question 13

what are the two types of vesicular transport

Answer 13

• exocytosis

- endocytosis

Question 14

what is exocytosis

Answer 14

• when substances are transported out of a cell through a vesicle
• a vesicle is like a bubble filled with a substance that is produced from the Golgi body.
• these vesicles move to the top of the cell membrane and rupture their contents into the surrounding tissue fluid

Question 15

what is endocytosis

Answer 15

when substances are enclosed by the cytoplasm into a cell and closed into vesicles

Question 16

what are the two types of endocytosis

Answer 16

• phagocytosis

- pinocytosis

Question 17

what is phagocytosis

Answer 17

when the cell takes in solids

Question 18

what is pinocytosis

Answer 18

when the cell takes in liquids

Question 19

what is diffusion

Answer 19

diffusion is the movement of molecules from an area of high concentration to an area of low concentration so that the particles are evenly distributed over the space available