cell transport

Question 1

phospholipids

Answer 1

cause the cell membrane to be selectively permeable.

Question 2

heads

Answer 2

are all hydrophilic

Question 3

tails

Answer 3

are all hydrophobic

Question 4

peripheral proteins

Answer 4

proteins that are located on the interior or exterior of the surface of the membrane; used for cell and hormone recognition.

Question 5

integral proteins

Answer 5

proteins that span the membrane and embedded within it; used to facilitate the passage of substances to large to pass through the bilayer.

Question 6

passive transport

Answer 6

movement of substances across the plasma membrane without requiring energy.

Question 7

diffusion

Answer 7

movement of particles from an area of high concentration to an area of low concentration.

Question 8

facilitated diffusion

Answer 8

movement of molecules from an area of high concentration to an area of low concentration with the help of membrane proteins.(integral)

Question 9

Osmosis

Answer 9

movement of water from an area of low solute concentration to an area of high solute concentration.

Question 10

Hypertonic

Answer 10

solute concentration outside cell is higher than inside the cell.

Question 11

Hypotonic

Answer 11

solute concentration outside cell is lower than inside the cell.

Question 12

Isotonic

Answer 12

solute concentration inside the cell is equal to the outside.

Question 13

plasmolysis

Answer 13

event that happens when plant cells are placed in hypertonic solutions; the cell pulls away from the cell wall.

Question 14

turgor pressure

Answer 14

slight pressure against the cell wall in plant cells; created when they’re in hypotonic solutions.

Question 15

Active transport

Answer 15

the movement of substances across the membrane against their concentration gradients.

Question 16

ATP

Answer 16

examples are cell pumps, endocytosis, and exocytosis.

Question 17

Cell membrane pumps

Answer 17

substances bind to a carrier protein that transports the substance against its concentration gradient with the help of energy(ATP).

Question 18

Endocytosis

Answer 18

a process in which cells ingest substances from the external environment with the help of ATP.

Question 19

phagocytosis

Answer 19

movement of large particles; cell eating.

Question 20

pinocytosis

Answer 20

movement of fluids; cell drinking.

Question 21

Exocytosis

Answer 21

movement f substances out of the cell.

Question 22

Purpose of cell transport

Answer 22

to reach cell equilibrium.(passive transport)