Tansport Across A Membrain

Question 1

Name two parts of the cell membrane

Answer 1

1, proteins

2, phospholipids

Question 2

What is the names given about the structure of the membrane

Answer 2

1, selectively permeable
2, Mosaic model
3, bio layer

Question 3

Two aspects of the phospholipid

Answer 3

1, hydrophobic tail

2, hydrophilic head

Question 4

The 3 types of entry and exit from the cell

Answer 4

1, diffusion (passive)
2, osmosis (passive)
3, active transport

Question 5

Describe diffusion

Answer 5

The movement of molecules from an area of high concentration to an area of low concentration down the concentration gradient

Question 6

The 3 main molecules moved in diffusion

Answer 6

1, oxygen
2, amino acids
3, carbon dioxide

Question 7

Describe osmosis

Answer 7

The movement of water from a hypotonic solution to a hypertonic solution down the concentration gradient across a selectively permeable membrane

Question 8

Describe the effects of osmosis in plant and animal cells

Answer 8

P- hypotonic = turgid || hypertonic = plasmolised || isotonic = normal
A- hypotonic = bursts || hypertonic =shrivels || isotonic = normal

Question 9

Describe active transport

Answer 9

The movement of molecules from and area of low concentration to an area of high concentration up the concentration by proteins. Requires energy