Unit 1 - KA1 (Division and Differentiation)

Question 1

What is a somatic cell?

Answer 1

Any cell in the body other than those involved in reproduction

Question 2

What is a germline cell?

Answer 2

Gametes (sperm and ova) and stem cells that divide to form gametes

Question 3

What are the 4 types of tissue cells?

Answer 3

Connective, muscle, nervous and epithelial

Question 4

What do somatic cells divide by?

Answer 4

Mitosis

Question 5

What do germline cells divide by?

Answer 5

Mitosis and meiosis

Question 6

What are embryonic stem cells?

Answer 6

Found in human blastocyst
Pluripotent (can make all cell types)

Question 7

What are adult tissue cells?

Answer 7

Found in specific areas of the body
Multipotent - can only take the type of cells in a particular tissue

Question 8

What are research use of stem cells?

Answer 8

The study of diseases and their development
Drug testing

Question 9

What are therapeutic uses of stem cells?

Answer 9

Regeneration of damaged skin to treat burn patients
Stem cell grafts for corneal repair

Question 10

What are ethical issue of stem cells?

Answer 10

Result in effective treatment of disease but results in the destruction of potential life

Question 11

What are the characteristics of a benign tumour?

Answer 11

• Slow growing
• Capsualted
• Non-invasive

Question 12

What are the characteristics of a malignant tumour?

Answer 12

• Fast-growing
• Non-capsualted
• Invasive