Movement Of Substances

Question 1

Diffusion

Answer 1

Movement from a region of high solute concentration to a region low solute concentration

Question 2

What are the 2 types of processes?

Answer 2

Passive : no energy required

Active : a lot of energy is required

Question 3

Osmosis

Answer 3

Movement of solvent from a region of low concentration to a region of high concentration across a semi permeable membrane (passive)

Question 4

Active transport

Answer 4

Movement of solute from a low to a high concentration (active)

Question 5

Hypertonic (plasmolyzed)

Answer 5

Solution that has a higher concentration that the solution on the other side of the semi permeable membrane (very concentrated) placed in water and a lot of sugar. Water exits by osmosis causing cell to shrink

Question 6

Hypotonic (turgid)

Answer 6

Solution that has a lower concentration than the solution on the other side of the semi-permeable membrane (placed in distilled water. Water enters cell by osmosis , vacuole expands bringing out turgor pressure.

Question 7

Isotonic (flaccid)

Answer 7

Coccentrations on either side of the semi permeable membrane are equal (no osmosis, placed in water and sugar)

Question 8

Hypotonic in animal cells

Answer 8

Cell will

Swell up and burst because the cell has no cell wall (haemolyzed)

Question 9

Draw a plasmolyzed cell

Answer 9

.

Question 10

What is turgor pressure?

Answer 10

Water enters the vacuole of the plant cell, causing it to expand, the cell wall exerts an equal and opposite pressure causing what is known as turgor pressure

Question 11

Osmoregulation to amoeba

Answer 11

It is a contractile vacuole
Water enters by osmosis is collected by contractile vacuole and emptied by the fusion of the vacuole with the cell membrane to remove excess water