Transportation of substances across cellular membranes

Question 1

membranes will accept molecules that are

Answer 1

relatively small, hydrophobic

Question 2

membranes will not accept molecules that are

Answer 2

relatively large, hydrophilic, charged

Question 3

what is passive transport

Answer 3

requires that molecules move down their concentration gradient

Question 4

what is simple diffusion

Answer 4

the movement of molecules from high c….ion to low concentration on their own

Question 5

what is facilitated diffusion

Answer 5

when a transport protein is needed

Question 6

what is osmosis

Answer 6

when water uses both simple and facilitated diffusion to cross

Question 7

what is an isotonic solution

Answer 7

a solution with a solute concentration of 0.9%

Question 8

what is a hypertonic solution

Answer 8

a solution with a solute concentration greater than 0.9%

Question 9

what is a hypotonic solution

Answer 9

a solution with a solute concentration less than 0.9%

Question 10

what is active transport

Answer 10

used to transport molecules across the membrane against a concentration gradient

Question 11

what is vascular transport

Answer 11

involves large quantities of substances or large objects crossing the membrane through the use of vesicles

Question 12

when bringing substances into the cell this is called

Answer 12

endocytosis

Question 13

when bringing substances out of the cell this is called

Answer 13

exocytosis

Question 14

what is a membrane protein

Answer 14

something that helps substances cross the cellular membrane

Question 15

what are examples of things that can cross the cellular membrane without help

Answer 15

H2O, O2, CO2

Question 16

what are examples of things that can’t cross the cellular membrane unless they have help

Answer 16

Cl⁻, glucose,