B1- Osmosis, active transport and diffusion

Question 1

What does water transport through in osmosis?

Answer 1

partially permeable membrane

Question 1

What is Osmosis ?

Answer 1

the net movement of water from an are of high water concentration (dilute solution) to an area of lower water concentration (Concentrated solution)

Question 2

facts about osmosis

Answer 2

-passive
-High to Low water concentration
-water only

Question 3

what are examples of osmosis?

Answer 3

-Water entering root hair cell to keep cell turgid

Question 4

What is Active transport?

Answer 4

active transport is the process which molecules move across a partially permeable membrane from a low (dilute) to a high (concentrated) solution.

Question 5

facts about active transport

Answer 5

-Against concentration gradient
-requires energy

Question 6

Examples of active transport

Answer 6

-carbon dioxide leaves cell, sugars are absorbed at end of small intestine
-Root hair cell absorption of mineral ions from soil

Question 7

What is diffusion?

Answer 7

Diffusion is the spreading out of particles from an area of higher concentration to an area of Lower concentration.

Question 8

where does diffusion occur? and why?

Answer 8

Diffusion occurs in gasses and liquids because particles are free to move.

Question 9

facts about diffusion

Answer 9

-down concentration gradient
-doesn’t require energy
-transports of solutes passive

Question 10

examples of diffusion

Answer 10

-Gas exchange in lungs
-Oxygen leaves leaf
-carbon dioxide leaves cell