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Cells

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elizabeth jones

on 11 March 2016

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Transcript of Cells

What do all living things have in common?
How do the following organisms
take in nutrients?
give off waste?
respond to stimuli?
grow?
reproduce?
All organisms are made up of cells
Cells are made up of organelles
="tiny" organs
Nucleus:
brain of the cell
contains the DNA
Cell Wall:
is only in plants and bacteria,
provides support and structure
Cell membrane:
controls what goes in and out of the cell
fluid mosaic of phospholipids bilayers and protein gates
http://www.brainpop.com/science/cellularlifeandgenetics/
http://www.brainpop.com/science/cellularlifeandgenetics/activetransport/preview.weml
http://www.brainpop.com/science/cellularlifeandgenetics/cells/preview.weml
Cytoplasm:
gel like liquid that the organelles are in
Golgi Body:
packages materials that are used by the cell
Vacuole

*large in the plant cell where it provides support
*stores water and food
Vesicle
*stores water food and waste
*lysosome are specific name for waste storing vesicles
ribosomes
make proteins
Mitochondria
where respiration occurs producing energy in the cell in the form of ATP
Chloroplasts
*only in plants
*where photosynthesis occurs
Mitosis
Meiosis
Endoplasmic Reticulum:
rough ER (has ribosomes on it)
the passageways that materials are transported around the cell on
cell division= producing two exact copies
*cell division in gametes (eggs, sperm, pollen, ovum)
*produce four cells with half the DNA.
Microbiology:
*what does micro mean?
*bio?
*ology
The study of little things like:
BACTERIA
VIRUSES
PROTISTS
Bacteria
classified by shape:
Spherical
like Streptococcus and Staphlyococcus
Rod-shaped
like E.coli
Spiral shaped
like spirillum
How big are protists, bacteria and viruses?
*protists are tiny
*bacteria are really really tiny
*viruses are WAY more tiny than either one!
How do cells get nutrient in and waste out?
Diffusion
*the movement of molecules from an area of high concentration to an area of low concentration
Osmosis
*the diffusion of WATER across a membrane
Passive Transport
*doesn't need energy=diffusion
Active Transport
*movement of molecules from low to high concentration
*doesn't happen on its own
*require energy (ATP)
http://www.williamsclass.com/SeventhScienceWork/ImagesCellBricks/Diffusion.gif
http://people.eku.edu/ritchisong/osmosis3.gif
*movement of molecules across the membrane that are too big to fit through the protein gates.
*exocytosis-out
*endocytosis-in
http://www.cellsalive.com/howbig.htm
Respiration:
occurs in the mitochondria
the chemical reaction between sugar and oxygen--> water and carbon dioxide and energy in the form of ATP
Photosynthesis
occurs in the chloroplasts
carbon dioxide + water +sunlight--> oxygen + sugar
Protists:
common in pond water
single celled
have organelles
specialized structures for moving
varied group besides these similar characteristics
Paramecium
has cilia: little hairs all over their bodies that beat to move
animal-like: eat other things
oral groove
Euglena
has a flagella- whip like tail for moving around
plant-like: has chloroplasts, makes own food through photosynthesis

Amoeba
psuedopods (fake feet) ooze cytoplasm in direction it wants to move
animal-like: eats other things

Volvox
colony of single-celled protists
each one has a flagella

How are our bodies put together?
Cells specialize to do different jobs
Protist Cartoon
Create a cartoon featuring a protist we have talked about.
Include a specialized structure (flagella, cilia, or pseudopods.
Include organelles
Full transcript