Chapter 1 Human Cells- Devision And Differentiation

Question 1

1. What name is given to human body cells that are not involvedin reproduction

Answer 1

Stomatic cells

Question 2

2. How many chromosomes are found in somatic cells

Answer 2

46

Question 3

3. By what process do somatic cells produce more somatic cells

Answer 3

Mitosis

Question 4

4. What name is given to the human cells involved in producingthe gametes for reproduction

Answer 4

Germline cells

Question 5

5.How many chromosomes are found in germline cells

Answer 5

46

Question 6

6.By what process do germline cells produce more germline cells-

Answer 6

Mitosis

Question 7

7. In which part of the body are germline cells found

Answer 7

Ovaries and testies

Question 8

8. By which process do germline cells produce the gametes(eggand sperm)

Answer 8

Meiosis

Question 9

9. How many egg or sperm are produced when a germline celldivides by meiosis

Answer 9

4

Question 10

10. Name the two types of stem cell

Answer 10

Embryonic and tissue stem cells

Question 11

11. What word is used to describe the ability of embryonicstem cells to divide into almost any cell type

Answer 11

Pluripotent

Question 12

12. What word can be used to describe the ability of tissuestem cells to divide into a limited range of cell types

Answer 12

Multipotent

Question 13

13. Name 5 uses of stem cells

Answer 13

1. Model cells to investigate howdiseases develop
2. Model cells to investigate how drugs work
3. Corneal repairs
4. skin grafts
5. bone marrow transplants in thetreatment of leukaemia

Question 14

14. What signals do cancer cells fail to respond to

Answer 14

Regulatory signals

Question 15

15. What name is given to the abnormal mass of cells formedby uncontrolled cell division of cancer cells

Answer 15

Tumour