Diffusion 🌷

Question 1

What is diffusion?

Answer 1

Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration.

Question 2

True or False: Diffusion requires energy input.

Answer 2

False

Question 3

Fill in the blank: The rate of diffusion is influenced by temperature, concentration gradient, and __________.

Answer 3

molecular size

Question 4

Which of the following factors does NOT affect the rate of diffusion? A) Temperature B) Pressure C) Color D) Concentration gradient

Answer 4

C) Color

Question 5

What is the concentration gradient?

Answer 5

The concentration gradient is the difference in concentration of a substance between two areas.

Question 6

True or False: Diffusion can occur in solids, liquids, and gases.

Answer 6

True

Question 7

Which process describes the movement of water molecules across a semi-permeable membrane?

Answer 7

Osmosis

Question 8

Short answer: What is Fick’s law of diffusion?

Answer 8

Fick’s law states that the rate of diffusion of a substance is proportional to the concentration gradient.

Question 9

What is the primary driving force behind diffusion?

Answer 9

The concentration gradient.

Question 10

True or False: Larger molecules diffuse faster than smaller molecules.

Answer 10

False

Question 11

Fill in the blank: In a hypertonic solution, the concentration of solutes is __________ outside the cell compared to inside.

Answer 11

higher

Question 12

What is facilitated diffusion?

Answer 12

Facilitated diffusion is the process by which substances cross membranes with the assistance of special proteins.

Question 13

Multiple choice: Which of the following is an example of diffusion? A) Breathing B) Sweating C) Perfume spreading in a room D) All of the above

Answer 13

D) All of the above

Question 14

True or False: Diffusion can only occur in gases.

Answer 14

False

Question 15

Short answer: What role does the semi-permeable membrane play in diffusion?

Answer 15

It allows certain molecules to pass while restricting others, affecting the diffusion process.

Question 16

What is the difference between passive and active transport?

Answer 16

Passive transport does not require energy, while active transport requires energy to move substances against their concentration gradient.

Question 17

Fill in the blank: __________ diffusion does not require a membrane.

Answer 17

Simple

Question 18

What is the significance of diffusion in biological systems?

Answer 18

Diffusion is crucial for processes such as nutrient uptake, gas exchange, and waste removal in cells.

Question 19

True or False: The speed of diffusion increases with higher temperatures.

Answer 19

True

Question 20

What is the term for the net movement of molecules from an area of low concentration to an area of high concentration?

Answer 20

Active transport

Question 21

Multiple choice: Which statement is true? A) Diffusion occurs only in liquids B) Diffusion is a passive process C) Diffusion requires a semi-permeable membrane D) All of the above

Answer 21

B) Diffusion is a passive process

Question 22

Fill in the blank: The process of diffusion continues until __________ is reached.

Answer 22

equilibrium

Question 23

What are the two types of diffusion?

Answer 23

Simple diffusion and facilitated diffusion.

Question 24

True or False: Diffusion can occur in a vacuum.

Answer 24

False

Question 25

Short answer: What is the role of temperature in diffusion?

Answer 25

Higher temperatures increase molecular motion, leading to faster diffusion.