How are cells involved when we
inherit traits?
Wednesday, 10/14/2015
https://www.youtube.com/watch?v=gw
cwSZIfKlM
Truth or Lie?
1.Each set of partners will have 12 cards with
statements about cells.
2.Together – Sort them into piles of statements
that are true and statements that are false.
3.Be ready to answer questions quickly about
which ones are true and which are false.
Truth or Lie?
I will read off:
• The statement number
• Ask you to signal with thumbs up if it’s
true
Don’t rely on others!
Cell Theory – Which are true?
1. All matter is made up of cells.
2. All living things are made up of cells.
3. There are no single-celled organisms.
4. Leaves contain cells, but roots do not.
5. Cells do not carry out essential life functions for the organism
they are part of
6. In the early development of an organism, cells grow in size but the
number of cells remains constant.
7. Cells provide structure but not function to living things.
8. New cells can only come from existing cells.
9. Some living parts of organisms are not made of cells
10.All cells are the same size and shape.
11. Cells are the smallest functional unit of a living thing.
12.Organisms grow when existing cells get larger
The 3 Correct Statements make up the
Cell Theory
All living things are made up of cells.
New cells can only come from existing cells.
Cells are the smallest functional unit of a
living thing.
All living things are made up of cells
Human Heart
Magazine Pictures
made of many tiny
Cells
made of many tiny
as
Colored dots
More Analogies using a Bridge map
Human Heart
made of many tiny
Cells
LEGO car
as
made of many tiny
Bricks
More Analogies using a Bridge map
?
Human Heart
made of many tiny
Cells
...
as
made of many tiny
...
?
New cells can only come from existing cells
One Cell
Allium cells in
different phases
of the cell cycle
Becomes 2
What are
the
squiggly
black
things?
New cells can only come from existing
cells Analogy
?
cells
Come from existing
cells
as
...
Come from existing
...
?
Cells are the smallest functional unit of a
living thing
How many
organelles can
you remember
from our cell
sale
presentations?
Ribosome
RNA
Protein
Smallest functional unit Analogy
Muscle Cells
Smallest functional
unit
Muscle group
as
Player
Smallest functional
unit
Team
PHOTOS:
http://science.nationalgeographic.com/science/photos/heart/#/donor-heart_933_600x450.jpg http://en.wikipedia.org/wiki/Muscle,
http://district.bluegrass.kctcs.edu/rmccane0001/shared_files/bio137website/BIO137/137Lab8/Lab8Images/LegMuscles-names.jpg
?
Smallest functional unit Analogy
?
Muscle Cells
Smallest functional
unit
Muscle group
as
...
Smallest functional
unit
...
PHOTOS:
http://science.nationalgeographic.com/science/photos/heart/#/donor-heart_933_600x450.jpg http://en.wikipedia.org/wiki/Muscle,
http://district.bluegrass.kctcs.edu/rmccane0001/shared_files/bio137website/BIO137/137Lab8/Lab8Images/LegMuscles-names.jpg
?
Cells are the smallest
functional unit of a living
thing
Human
body has
230
DIFFERENT
types of
cells
Gland cells
Digestive enzymes
Hormone cells
Thyroid cells that fuel
your metabolism
Keratin cells
Hair root sheath cell
Nerve Cells
Sense hot and cold
Muscle Cells
Movement and heart
Blood Cells
Carry oxygen/carbon
dioxide, fight
Microscope work led to discovery
of cells
Leeuwenhoek ( 1600’s)
• First to see living microscopic
organisms
Robert Hooke ( 1665)
• Used light microscope to look at
thin slices of plant tissues -- cork
• Looked empty, like monk’s
chamber
• Called tiny chambers “cells”
Using the Cell Theory, answer these 3
questions:
Where do cells come from?
How do organisms grow?
What function does a cell have?
Revisit Cell Theory – Which 3 are true?
1. All matter is made up of cells.
2. All living things are made up of cells.
3. There are no single-celled organisms.
4. Leaves contain cells, but roots do not.
5. Cells do not carry out essential life functions for the organism
they are part of
6. In the early development of an organism, cells grow in size but the
number of cells remains constant.
7. Cells provide structure but not function to living things.
8. New cells can only come from existing cells.
9. Some living parts of organisms are not made of cells
10.All cells are the same size and shape.
11. Cells are the smallest functional unit of a living thing.
12.Organisms grow when existing cells get larger
The Life of a Cell
The Cell Cycle Occurs in 3 Stages
• Interphase – the longest phase
– G1, S and G2
• Mitosis – the process of cell division
– Prophase
– Metaphase
– Anaphase
– Telophase
• Cytokinesis – forms 2 identical cells
Mitosis – the process of cell division
• Cell division is an important process because it is
involved in growth, development, repair and
reproduction
• Cells contain genetic information, DNA, that tells
it what to do
• When a cell divides into two new cells, each cell
gets a complete set of DNA from the parent cell.
• These new cells are created from a parent cell
through the process of mitosis
Interphase is the
longest phase of
the cell cycle.
The G1, S and
G2 phases all
occur during
interphase. The
process of
Mitosis only
takes up about
25% of the cells
life.