Chapter 2 Living Processes in Multicellular Organisms

Question 1

Structure and use of muscle cell

Answer 1

arranged as Multinuclear striated fibres
Contract and relax to generate movement

Question 2

Structure and use of nerve cell

Answer 2

Long and thin
Sends nerve impulses

Question 3

Structure and use of white blood cell

Answer 3

Can change shape
Destroys pathogen

Question 4

Structure and use of epithelial cells

Answer 4

Thin and flat
Coats the surface of the organs in the digestive tract

Question 5

Structure and use of red blood cells

Answer 5

Biconcave disc ( optimize transporting oxygen )
No nucleus

Question 6

Structure and use of sperm cell

Answer 6

Long tail to enable it to swim faster to the ovum in the Fallopian tube
Carries a set of chromosomes from the male

Question 7

Structure and use of sieve tube element

Answer 7

Long cylindrical tubes arranged from end to end
Transports organic material from leaves to storage organs

Question 8

Structure and use of xylem vessel

Answer 8

Long, continuous hollow tube
Transport water and mineral salts from roots to other parts of the plant

Question 9

Structure and use of Palisade Mesophyll Cells

Answer 9

Long cylindrical cells, arranged vertically and close to each other
Contains high chlorophyll density which allows maximum absorption of sunlight for photosynthesis

Question 10

Structure and use of spongy mesophyll cells

Answer 10

Arranged loosely with air space in between to allow the exchange of gas

Question 11

Structure and use of guard cells

Answer 11

Modified lower epidermal cells with the thicker cell wall on the inner side
Controls the opening and closing of the stoma

Question 12

Structure and use of root hair cells

Answer 12

Has long projections which adds surface area for absorption of mineral salts and water