cells and specialised cells

Question 1

cells are

Answer 1

the basic units of life

Question 2

function of cell membrane

Answer 2

controls passage of substances into and out of cell

Question 3

function of cytoplasm

Answer 3

site of all chemical reactions in cell

Question 4

function of nucleus

Answer 4

contains genetic material and controls activities of the cell

Question 5

function of vacoule

Answer 5

• full of liquid to maintain shape and firmness
• contains cell sap (solution of mostly sugars)

Question 6

function of cell wall

Answer 6

prevents cell from bursting and helps maintain shape

Question 7

function of chloroplast

Answer 7

contains chlorophyll which absorbs sunlight needed for photosynthesis

Question 8

function of ribosome

Answer 8

synthesises proteins (makes proteins)

Question 9

function of mitochondria

Answer 9

site of cellular (aerobic) respiration

Question 10

how are new cells made

Answer 10

division of existing cells

Question 11

function of red blood cell

Answer 11

carry oxygen throughout blood

Question 12

rbc adaptations

Answer 12

• contain haemoglobin to carry oxygen
• no nucleus so more space for oxygen
• biconcave shape increases surface area

Question 13

function of root hair cell

Answer 13

uptake of water and mineral ions from the soil

Question 14

adaptations of root hair cell

Answer 14

long and tubular so large surface area

Question 15

function of neurone (nerve cell)

Answer 15

conduct electric nerve impulses throughout the body

Question 16

adaptations of neurone

Answer 16

• long and thin so can carry nerve impulses a great distance
• has a fatty sheath around axon for insulation so quicker transmission

Question 17

function of ciliated cell

Answer 17

movement of mucus in the trachea + bronchi

Question 18

function of sperm and egg cells

Answer 18

sexual reproduction

Question 19

function of palisade cell

Answer 19

photosynthesis

Question 20

define tissue

Answer 20

group of cells with similar structures working together to perform a shared function

Question 21

define organ

Answer 21

group of tissues working together to perform a specific function

Question 22

define organ system

Answer 22

group of organs with similar functions working together to perform a specific function

Question 23

define organism

Answer 23

group of organ systems working together

Question 24

magnification formula

Answer 24

image size divided by actual size

Question 25

image size formula

Answer 25

magnification times actual size

Question 26

actual size formula

Answer 26

image size divided by magnification