SB2b - Growth in Animals

Question 1

What is growth?

Answer 1

• Growth is the increase in size, length
  and mass, and an increase in cell
  number.

Question 2

What are the two steps in which growth takes place in living organisms?

Answer 2

1) Cell division (mitosis) that
increases the number of cells

2) Cell growth where the new cells
become bigger

Question 3

What does it mean when a cell becomes cancerous?

Answer 3

it begins to grow and divide uncontrollably

Question 4

What is a tumour?

Answer 4

• A group of cancerous cells produces a
  growth called a tumour

Question 5

What is the purpose of percentiles?

Answer 5

Percentiles are used to compare certain characteristics against the total population

Question 6

Describe how the Red blood cell has adapted to its function?

Answer 6

Have haemoglobin, no nucleus and biconcave disc shape to
increase their surface area and carry MORE oxygen

Question 7

Describe how the Nerve cell has adapted to its function?

Answer 7

Very long and thin to carry signals fast

Question 8

Describe how the Fat cell has adapted to its function?

Answer 8

Fat cells Store fat to release a lot of energy

Question 9

Describe how the Muscle cell has adapted to its function?

Answer 9

Have special proteins that help it contract and move the body
when needed, plus many mitochondria to produce energy