Module 5: Osmosis in Plant Life

Question 1

movement of water molecules across a semipermeable membrane from a region of low water concentration

Answer 1

osmosis

Question 2

cell membrane allows certain molecules to pass through while blocking others

Answer 2

selectively permeability

Question 3

how does water move in terms of water potential

Answer 3

water moves from an higher water potential (more free water) to areas of lower water potential)

Question 4

osmosis continues until water potential on both sides of the membrane is equal

Answer 4

equilibrium

Question 5

defining plasmolysis:

Answer 5

loss of water, cell membrane shrinking, cell wall remains

Question 6

when a plant cell is placed in a hypertonic solution, what happens to the water inside the cell?

Answer 6

loss of water

Question 7

what causes the cytoplasm to shrink

Answer 7

cell membrane detaches from the cell wall

Question 8

in plasmolysis the cell wall remains intact but what pressure does the cell lose

Answer 8

turgor pressure

Question 9

stages of plasmolysis:

Answer 9

• normal cells
• inciplent plasmolysis
• evident plasmolysis
• final plasmolysis

Question 10

has a higher solute concentration than the cell’s cytoplasm, causing water to move out and plant’s plasmolysis

Answer 10

hypertonic solution

Question 11

effects of plasmolysis:

Answer 11

wilting, reduce photosynthesis

Question 12

happens to plants as the cells lose their turgor pressure and become flaccid

Answer 12

wilting

Question 13

why does plasmolysis reduce the rate of photosynthesis

Answer 13

due to the cell’s internal environment becoming disrupted

Question 14

state of plant cell when water enters and vacuoles swells and pushes against the cell

Answer 14

turgid cell

Question 15

state of a plant cell due to water loss where the vacuoles shrinks and the cells loses shape

Answer 15

flaccid cell

Question 16

direction of water whan a plant cell is placed in a hypotonic solution

Answer 16

water moves into the cell

Question 17

turgidity causes the cell to ______, creating turgor pressure

Answer 17

expand/swell

Question 18

pressing against the cell wall due to more water entering

Answer 18

turgor pressure

Question 19

provides structural support to plant tissues, contributes to plant growth, essential for plant survival

Answer 19

turgidity

Question 20

a state of plant that is reversible

Answer 20

plasmolysis

Question 21

practical applications of osmosis:

Answer 21

food preservaion, agriculture, medicine

Question 22

osmosis is used in preserving foods by creating a ______ environment

Answer 22

hypertonic

Question 23

osmosis is involved in this medical procedure where waste products are removed from blood

Answer 23

dialysis

Question 24

importance of osmosis in plant growth and development

Answer 24

• water absorption
• nutrient transport
• cell expansion drives cell growth

Question 25

what specimen is used in examining the turgidity and plasmolysis in plant cells

Answer 25

Rheo discolor