2C cell size and shape

Question 1

red blood cells

Answer 1

cells that transport oxygen through the bloodstream and do not contain a nucleus

Question 2

ovum

Answer 2

a fully mature
female egg cell which, when
fertilised, can divide and give rise
to an embryo

Question 3

what do Ova do

Answer 3

Ova are key to reproduction and contain genetic
information, organelles, and the nutrients required to create an embryo

Question 4

what do red blood cells do

Answer 4

red
blood cells circulate oxygen around the body by squeezing through tiny capillaries

Question 5

what is the benefits of having small cells

Answer 5

Distances to travel within the cell are smaller, so the intracellular transport of
molecules is faster.
The exchange of materials with the extracellular environment can occur efficiently and effectively due
to a high surface area to volume ratio. This will be explained later in this lesson

Question 6

surface area and volume ratio

Answer 6

A greater surface area and smaller volume, or high SA:V, can help a cell exchange materials
efficiently with the environment.

Question 7

volume

Answer 7

the amount of space
inside an object. Measured in
(units of length)
eg: cm3 or mm3

Question 8

surface are

Answer 8

the sum of the
area of all exposed sides of
a three-dimensional shape.
Measured in (units of length)
eg: cm2 or mm2

Question 9

ratio

Answer 9

a comparison between
two things to show proportions

Question 10

SA:V

Answer 10

a comparison of the
amount of surface area per unit of
volume.

Question 11

a note

Answer 11

Smaller objects have larger surface area to volume ratios

Question 12

a note

Answer 12

objects with long lengths and short depths and widths are likely to have a higher SA:V.