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Diffusion and Osmosis 8/19

Last updated about 2 hours ago

23 Nsɛmmisa

Hyɛ no nsow a efi ɔkyerɛwfo no hɔ:

***No video sheet with any video. Just watch and answer questions

Akwankyerɛ

***No video sheet with any video. Just watch and answer questions

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Asemmisa {{asɛmmisaAhyɛnsode}}

1.

Diffusion is

active transport of particles across the cell membrane.

passive transport of particles across the cell membrane.

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Asemmisa {{asɛmmisaAhyɛnsode}}

2.

diffusion moves down the concentration gradient from areas of

lower concentration to areas of higher concentration.

higher concentration to areas of lower concentration.

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Question 5

02:41

Question 6

04:19

Question 7

05:05

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Asemmisa {{asɛmmisaAhyɛnsode}}

8.

Molecules move using: __________

passive energy

kinetic energy

potential energy

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Asemmisa {{asɛmmisaAhyɛnsode}}

11.

Simple diffusion is defined as the movement of

molecules from areas of higher concentration to areas of lower concentration.

molecules from areas of lower concentration to areas of higher concentration.

water molecules across a membrane.

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Question 15

02:15

Question 16

03:11

Question 17

04:08

Question 18

05:18

Question 19

05:36

Question 20

07:08

Question 21

09:32

Asemmisa {{asɛmmisaAhyɛnsode}}

22.

What is true for osmosis?

A type of passive transport

Movement of glucose into the cell

Movement of water from low H₂O concentrations to high H₂O concentration

Transport of proteins across the cell membrane

Asemmisa {{asɛmmisaAhyɛnsode}}

23.

How does osmosis differ from diffusion?

Osmosis requires energy

Osmosis involves water, not all solutes

Osmosis can only occur in animal cells

Asemmisa {{asɛmmisaAhyɛnsode}}

3.

The principal force driving movement in diffusion is the __________.

temperature

particle size

concentration gradient

membrane surface area

Asemmisa {{asɛmmisaAhyɛnsode}}

4.

Eventually the two sides will come to equilibrium which is when the concentration of particles are equal on both sides.

Nokorɛ

Ɛnyɛ ampa

Asemmisa {{asɛmmisaAhyɛnsode}}

9.

What happens to the movement of molecules when the temperature is raised? (red food coloring demo)

they move faster, but still down a concentration gradient until equilibrium is reached

they move faster against (up) the concentration gradient

movement remains the same

Asemmisa {{asɛmmisaAhyɛnsode}}

10.

What happens to the movement of molecules when their temperature is lowered? (blue food coloring demo)

move slower against the concentration gradient

move slower, but still down the concentration gradient until equilibrium is reached

movement remains the same

Asemmisa {{asɛmmisaAhyɛnsode}}

12.

When sugar is mixed with water, equilibrium is reached when

molecules of sugar stop moving.

the dissolved sugar molecules are evenly distributed throughout the solution.

Asemmisa {{asɛmmisaAhyɛnsode}}

13.

The rate of diffusion is affected by which of the following? Select all that apply.

temperature

size of molecules

steepness of the concentration gradient

Asemmisa {{asɛmmisaAhyɛnsode}}

14.

The molecules in a solid lump of sugar do not move.

True

False