osmosis and diffusion

Question 1

What is Biology?

Answer 1

the study of organisms

Question 2

Name 6 careers in biology

Answer 2

medical doctor, biochemist, biologist, dermatologist, forensic scientist, nurse

Question 3

What is Osmosis?

Answer 3

Osmosis is the movement of water molecules through a semi-permeable membrane from a region with high concentration to a region with lower concentration.

Question 4

Give five examples of osmosis

Answer 4

feeling thirsty after having salty food, kidney dialysis, plants absorbing water from the soil through the roots, when the fingers are placed in water for a long period of time and they become pruney, If a freshwater, or saltwater fish is placed in water with different salt concentrations the fish dies due to entry or exit of water.

Question 5

What is diffusion

Answer 5

Diffusion is the spreading of particles from a region with high concentration to a region with low concentration

Question 6

What is concentration

Answer 6

the amount of substance in a defined space.

Question 7

What is a solute?

Answer 7

the substance being dissolved in a medium

Question 8

What is a solutant \ solvent

Answer 8

the medium a substance is being dissolved into

Question 9

What is a solution?

Answer 9

A solution is the mixture created by a solute and a solvent

Question 10

What is a concentration gradient?

Answer 10

the gradual change in the amount of substance in a solution

Question 11

What are 3 types of osmosis?

Answer 11

isotonic, hypotonic and hypertonic

Question 12

Differentiate among the 3 types of osmosis

Answer 12

in a hypotonic solution the size of the cell increases because more water is going inside of the cell, in a hypertonic solution the size of the cell decreases and shrivels up because more water is coming out of it, and in an isotonic solution there is an equal amount of water molecules both inside and outside of the cell.

Question 13

What is lysis?

Answer 13

the breaking down of the membrane of a cell

Question 14

Define lyse

Answer 14

to break apart a larger particle into smaller pieces

Question 15

In what type of osmotic solution can animal cells survive in ONLY?

Answer 15

an isotonic solution

Question 16

What will happen to an animal cell when placed in a hypotonic solution?

Answer 16

the cell will lyse / break apart into smaller pieces

Question 17

What is osmotic pressure?

Answer 17

Osmotic pressure is the pressure required to stop water from diffusing through a membrane

Question 18

give five examples of diffusion

Answer 18

food coloring spreading when it is placed in water, opening a soda bottle and the CO2 diffuses into the air, the smell of perfumes, dipping tea bags in hot water, and dust particles diffusing into the air causing air pollution.