C1L2: Specialised Cells

Question 1

3 features of a nerve cell?

Answer 1

• dendrites (to connect nerve cells)
• axon (conduct electrical impulse in 1D)
• sheath (insulate impulse)

Question 2

3 features of a sperm cell?

Answer 2

• acrosome with enzymes to break egg
• tail to swim to egg
• mitochondria to provide energy for tail

Question 3

3 features of muscle cells?

Answer 3

• proteins to slide
• mitochondria for contractions
• glycogen to store glucose

Question 4

2 features of phloem cells?

Answer 4

• companion cells containing mitochondria

- sieve plates to allow sugars to flow by translocation

Question 5

Function of phloem cells?

Answer 5

transporting glucose from leaves to rest of plant

Question 6

Function of xylem cells?

Answer 6

transportation of water & mineral ions from root to leaves

Question 7

A feature of xylem cells?

Answer 7

hollow tubes strengthened by lignin

Question 8

3 features of a root hair cell?

Answer 8

• extension at end (increases SA)
• mitochondria to fuel active transport
• no chloroplasts (no light underground)

Question 9

What is translocation?

Answer 9

movement of dissolves sugars & water through phloem from leaves