LAB
Questions for Why Are Cells So Small?
Part 1: Observation and calculations on two three-dimensional objects
.
1. Examining the two cubes in your kit:
Table 1
Dice Dimensions Surface Area
(cubes) (Length, width, # of sides x
and height) length x width
Example: length = 3 mm 6 sides x 3 x 3 =
Cube = 3 mm width = 3 mm 54 mm?
height = 3 mm
Volume
Length x width
x height
Ratio
(surface area/
volume)
Im
=
54/27 (Divide
the surface area
by the volume.
The ratio is that
number over 1.)
2/1 ratio
Small dice
5 mm
-
Large dice
16 mm
2. Consider the information in the chart above. (Remember: a higher ratio is better for
diffusion.) As the volume increased:
a. What happened to the ratio?
b. If these cubes were cells, which ratio would make diffusion easier?
c. Which size cube would make a more efficient cell?

Which of the following statements is correct in hour our immune system responds to a potential pathogen? a. the adapted immune system will call on the innate immune system to destroy the pathogen. b. b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c. the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. d. the t-cells in the adapted immune systems are the first to recognize the pathogen vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a. antigen, antibody b. antibody, antigen c. antibody, antibiotic d. antibiotic, antibody