Cells and Exchange: Specialised Cells

Question 1

What are the adaptation of a RBC?
(2)

Answer 1

1. -Bi-concave since they dont have a nucleus and to increase the surface area to bind haemoglobin.
2. Flexible to pass through narrow spaces

Question 2

Sperm Cells
(3)

Answer 2

• A long tail to swim faster
• Pointy head to pentrate the egg
  -Lots of mitochondria for energy

Question 3

Egg Cells
(3)

Answer 3

• Many mitochondria for the baby
  -Thick lining
• Cytoplasm to sustain the embryo

Question 4

Nerve Cells
(3)

Answer 4

• Long and thin for faster impulses
• Myeline sheaths to speed up impulses and insulate the axon
  -Many Dentrites for more impulses

Question 5

Muscle Cells
(1)

Answer 5

-Lots of mitochondria to provide energy for the contractions

Question 6

Palisade Cells
(2)

Answer 6

-Lots of chloroplasts for photosynthesis
- Long and thins for higher surface area to absorb light

Question 7

Xylem
(2)

Answer 7

Strong cell wall to withstand pressure
Made of dead cells

Question 8

Phloem
(1)

Answer 8

Contain sleve plates

Question 9

Root Hair
(2)

Answer 9

Long and thin to increase surface area
Thin wall to allow substance to pass through

Question 10

Gaurd Cells
(1)

Answer 10

Can change shape to open and close the Stomata