Cell Transport

Question 1

What is the role of cell membrane

Answer 1

Selectively permeable, control the transport of particles in and out of the cell, essential for the cell’s survival

Question 2

What is the 4 points of particle model matter

Answer 2

1. All matter is made of particles
2. Particles in matter are constantly moving. (faster in gases/liquids, slower in solids)
3. Particles are attracted to each other or bonded together
4. Particles have spaces between them

Question 3

The type of transport used is based on the molecules..

Answer 3

size, charge, and whether or not they’re soluble in lipids

Question 4

What are the 5 types of transport

Answer 4

1. Passive transport
2. Active transport
3. Endocytosis
4. Exocytosis
5. Phagocytosis

Question 5

What is passive transport and the three types

Answer 5

Transport that does NOT require energy, used by small molecules, continues until an equilibrium is reached (same amount on both sides)

A. Diffusion
B. Osmosis
C. Facilitated diffusion

Question 6

What is diffusion

Answer 6

Movement of particles from an area of high concentration to an area of low concentration

Is also how dialysis tubing works

Question 7

What is osmosis and its three kinds

Answer 7

Diffusion of water molecules across the cell membrane

Hypertonic
Hypotonic
Isotonic

Question 8

What’s the difference between hypertonic, hypotonic, and isotonic

Answer 8

Hypertonic - more solute particles outside the cell, water diffuses out the cell. In animal cells causes crenation and plant cells plasmolysis

Hypotonic - less particles outside and water moves into the cell causing it to swell. In animal cells causes cytolysis in plant cells causes deplasmolysis

Isotonic - same amount on both sides and NO net movement of solutes

Question 9

What is facilitated diffusion and what 2 things does it involve

Answer 9

Used by small substances not soluble in lipids (fat)

Channel proteins
Carrier proteins

Question 10

What are channel and carrier proteins

Answer 10

Channel - created pores which particles can travel

Carrier- move the molecules across the membrane, change shape whilst doing so

Question 11

What is active transport and the two types

Answer 11

Transport that requires energy

Endocytosis
Exocytosis

Question 12

What’s the difference between Endocytosis and Exocytosis

Answer 12

Endo - Uses ATP and vesicles to move large molecules into the cell

Exo - Uses ATP and vesicles to move large molecules out of the cell