Topic 01-Specialised cells

Question 1

Specialty of red blood cells

Answer 1

Have no nucleus to provide more space to contain haemoglobin for carrying more oxygen to different parts of the human body

Question 2

Specialty of root hair cells

Answer 2

1. Found at the tip of the root of a plant

2. Have finger-like projections to increase surface area for absorbing water and mineral ions

Question 3

Specialty of palisade mesophyll cells

Answer 3

1. Closely packed, columnar cells under the epidermis
2. Contains a high density of chloroplast
3. Carry out photosynthesis

Question 4

Specialty of Ciliated cells

Answer 4

1. Cell surface has a layer of hair-like structure(cilia)which can move together to create a current
2. Along the trachea and bronchi, ciliates cells help to move and push mucus, which trapped dust and microbes in the air, away from the lungs

Question 5

Specialty of xylem vessels

Answer 5

1. A hallow tube of dead cells
2. The cells have no end walls and is strengthened by lignin
3. Transport water and mineral ions and also supports the plant

Question 6

Specialty of nerve cells

Answer 6

1. For conducting nerve impulses
2. The cell has a long fibre called an axon along which nerve impulses travel
3. May be covered with a fatty sheath which gives electrical insulation
4. With many branched endings to connect with many other cells

Question 7

Specialty of sperm and egg cells

Answer 7

1. For reproduction
2. Sperms are small and mobile
3. Eggs are large with stored nutrients