lab #4

Question 1

only allows certain molecules through and blocks others

Answer 1

semipermeable membrane

Question 2

influenced by changes in nonpermeable solute concentration

Answer 2

osmotic pressure

Question 3

increases the amount of water that will cross the membrane

Answer 3

higher nonpermeable solute

Question 4

what is a solution with a higher concentration of nonpermeable solutes in comparison to another solution

Answer 4

hypertonic

Question 5

what is a solution with a lower concentration of nonpermeable solutes in comparison to another solution

Answer 5

hypotonic

Question 6

the movement of water across a selectively permeable membrane from a hypotonic solution into a hypertonic solution

Answer 6

osmosis

Question 7

what is the pressure applied to a selectively permeable membrane to prevent osmosis

Answer 7

osmotic pressure

Question 8

what is a long tube of glassware with an open round reservoir at one end

Answer 8

thistle tube

Question 9

what is balanced so water enters and leaves cells at the same rate

Answer 9

isotonic environment

Question 10

what tends to cause a cell to shrivel or collapse as water exits the cell

Answer 10

hypertonic environment

Question 11

what tends to cause a cell to swell or burst as water enters the cell

Answer 11

hypotonic environment

Question 12

what is the ability of a solution to change the volume of a cell through osmosis

Answer 12

tonicity

Question 13

a solution with the same concentration of nonpermeable solutes in comparison to another solution

Answer 13

isotonic

Question 14

a RBC that develops abnormal notchings on its cell membrane due o loss of water

Answer 14

crenated RBCs

Question 15

RBCs whose membranes have burst apart

Answer 15

lysed RBC

Question 16

what do cells that retain water do

Answer 16

maintain rigid tisse structure

Question 17

what will cells that lose water do

Answer 17

lose tissue rigidity and become limp

Question 18

what type of cells have a rigid cell wall that helps them keep their shape even when water moves into or out of them

Answer 18

elodea