Diffusion

Question 1

What factors affect diffusion and how?

Answer 1

1. Temp : hotter means more kinetic energy meaning faster movement and diffusion
2. Size of molecules : smaller means faster diffusion
3. Concentration gradient : steeper means faster diffusion

Question 2

What is difference between facilitated and normal diffusion?

Answer 2

Facilitated only allows molecules to enter concentration gradient with help of special carrier protein in membrane.

Plasma membrane is semi permeable.

Question 3

What is osmosis?

Answer 3

Special case of diffusion when water molecules can pass through gradient freely.

Question 4

What are the different types of solutions?

Answer 4

1. Isotonic : when osmotic concentration of both solutions are equal
2. Hypertonic : solution with higher concentration
3. Hypotonic : solution with lower concentration

Question 5

Higher concentration of water means?

Answer 5

Higher water potential

Question 6

Look at worksheets on plants and osmosis

Answer 6

.refer to next page of notebook as well

Question 7

What is active transport

Answer 7

Molecules moved against concentration gradient through carrier proteins.

Requires energy

Question 8

What is an example? How does it show active transport

Answer 8

Root hair cell in plants. Mineral concentration in soil is lower than in plant. Therefore it goes up the gradient

Question 9

What is diffusion?

Answer 9

When molecules disperse and dissolve throughout a solution.

When molecules move from an area of high concentration to area of low concentration