Biology 2

Question 1

What is passive transport?

Answer 1

High concentration to low concentration. No energy (ATP) is required.

Question 2

What is concentration gradient?

Answer 2

The difference between the high and low concentration areas. Greater difference = faster the particles move, eventually equilibrium is reached.

Question 3

What is equilibrium?

Answer 3

Particles do not stop moving, they continue to move back and forth across the concentration gradient.

Question 4

Passive transport cont..

Answer 4

Molecule always move randomly and from areas of high concentration to areas of low. This is diffusion.

Question 5

Osmosis

Answer 5

The diffusion of water across a cell membrane.

Question 6

Indigenous understandings

Answer 6

Honey is applied to wounds for treatment, creates a hypertonic situation.

Question 7

What is facilitated diffusion?

Answer 7

Passive transport, carrier proteins bind to larger molecules and change their shape so molecules can diffuse through, used for molecule that are too large and not solubles.

Question 8

Active transport

Answer 8

Work against concentration gradient to low concentration to high concentration, energy (ATP) is required, carrier proteins work as a pump.

Question 9

Endocytosis

Answer 9

The cell membrane creates a vesicle for substances that are too large for passive or active transport

Question 10

Exocytosis

Answer 10

A vesicle fuses with the cell membrane and then ruptures to release its contents outside the cell. Gets rid of cell waste, gets out the valuable materials out the cell made.