This document contains slides summarizing various topics related to cell biology. It covers concepts such as antibiotic resistance, the selectively permeable cell membrane, the fluid mosaic model of the membrane structure, types of membrane transport including diffusion, osmosis, and active transport. It also discusses hypertonic, hypotonic and isotonic solutions, mitosis, chromosomes, and cancer. The slides provide definitions and brief explanations of these key cellular structures and processes.

1. Slide # 1

2. Antibiotic Resistance
• Bacteria evolve
resistance to
antibiotics as a result
of their widespread
use.
• Drug resistant genes
allow them to
survive; the
antibiotics no longer
work (ex. MRSA).
Slide #2

3. Selectively Permeable
Property of the cell
membrane allowing
some substances to
go through while
others cannot.
Slide #3

4. Fluid Mosaic Model
• The cell
membrane is
fluid: flexible and
the parts move
around.
• It is a mosaic:
made of many
different parts.
Slide #4

5. Lipid bilayer
• Flexible double-
layered sheet
making up the cell
membrane.
• It forms barrier
between cell and
surroundings.
Slide #5

6. Diffusion
• Movement of
particles from
high to low
concentration.
• Type of passive
transport.
Slide #6

7. Passive Transport
Movement of
materials across the
cell membrane
without using
energy.
Slide #7

8. Active transport
• Movement of
materials across
the cell
membrane from
low to high
concentration.
• Requires energy
(ATP).
Slide #8

9. Osmosis
• Diffusion of water
through a
semipermeable
membrane.
• H2O will move to
the area of higher
particle
concentration.
Slide #9

10. Hypertonic
• The solution has a
higher solute
concentration than
the cell.
• H2O moves out of
the cell causing it
to shrink.
Slide #10

11. Hypotonic
• The solution has a
lower solute
concentration than
the cell.
• H2O moves into
the cell causing it
to swell.
Slide #11

12. Isotonic
• The concentration
of solutes is the
same inside and
outside the cell.
• Water moves
equally in both
directions.
Slide #12

13. Solution Concentration Comparison
Slide # 13

14. Mitosis
• Process of cell
division and
reproduction;
produces 2 identical
“daughter” cells from
one “parent” cell.
• Each has complete
set of chromosomes
(DNA).
Slide #14

15. Chromosome
Cell structures
containing genetic
material (DNA) that
is replicated (copied)
and passed from one
generation of cells to
the next.
Slide #15

16. Cancer
• Disorder in which some of the body’s cells lose
the ability to control growth due to mutation in
genes regulating cell growth/division.
• Cells grow uncontrollably.
Slide #16