Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

Bio - Cells

Cell Structure
by

Teresa Friedrichsen

on 18 November 2016

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Bio - Cells

Prokaryotic Cell
Eukaryotic Cell
2. Nucleolus
Made of RNA & proteins
Ribosomes made here
3. DNA in chromatin form
Instructions for making proteins
1. Nuclear membrane
Double bilayer
Contains pores
Mitochondria
Animal AND plant cells
Inner & outer membranes
Extracts energy from food (glucose) using oxygen: Cellular Respiration!!
Chloroplast
In plants and algae
2 outer membranes + stacks of inner membranes that contain chlorophyll
Use light energy to make food + O2- Photosynthesis
Cytoplasm
Mostly water
Contains dissolved molecules like proteins, ions, minerals
Ribosomes
Made of RNA & proteins
Free or attached to ER
Protein factories
Where are they made?
Endoplasmic Reticulum
Folded membranes
Complex network of channels
Transport materials through cells
Ship products to Golgi
RER has ribosomes - makes proteins
SER - makes lipids & carbs
Golgi Apparatus or Sac
Flattened stacks of membranes
Modify, package, & distribute molecules
UPS or post office!
Vesicles
Membrane “trucks”
Formed by pinching off of ER or Golgi
Transport molecules from ER to Golgi to membrane or other location
Vacuoles
Large membrane-bound sacs
Plants – mostly store water but also salts, toxins, food, wastes, or pigments
Lysosomes
Specialized vesicles that contain enzymes
Fuse with food vesicles or other structure & break down contents
Clean up crew, recycling
cytoplasm
lysosome
1. Microtubules
Tubes made of protein subunits
Maintains cell shape
Tracks for movement of organelles
2. Intermediate Filaments
In-between size
Provides strength
3. Microfilaments
Thin threads
Help cells move & divide
Centrosomes
Produce microtubules used in cell division
Includes centrioles in animal cells (only)
Cell Wall
Structure & support
Bacteria – contain peptidoglycan
Fungi – contain chitin
Plants contain cellulose, a polysaccharide indigestible by humans
Cilia & Flagella
Cilia – many & short
Flagella – few & long
Move
1-celled organisms in liquid or
surrounding liquid over the cell
http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=eurekah&part=A75995
2. CHOLESTEROL
4. CARBOHYDRATES
3. PROTEINS
1. PHOSPHOLIPID BILAYER
HOMEOSTASIS
How?
Surrounds ALL cells
Sends & receives messages
Regulates the cell’s internal environment at a constant, suitable level…
PlASMA MEMBRANE OVERVIEW
It is… Selectively Permeable: Only specific kinds and amounts of ions or molecules can enter or exit a cell
“true”
Nucleus
Other kingdoms
Large cells
Single or multi
Organelles
“before”
No nucleus
Bacteria
Small cells
Single cells
No membrane compartments
PROKARYOTE EUKARYOTE
kary = “kernel”
Organelles
Membrane-bound structures (usually)
Increase efficiency of reactions
Compartmentalizes cell functions
Analogy: 1 room school vs. VMA
1000 mm (milli) = 1 m
1000 μm (micro) = 1 mm
1000 nm (nano) = 1 μm
How big are these?
Metric Measurements
Max 1500X magnification
Cells can be alive
Light waves refracted by lenses
1. Light
Magnifies 250,000X
Cells dead - in vacuum or killed by stain
Electron beam magnifies specimen
2. Electron
SEM - Scanning - scans surface of object
TEM - Transmission - beam passes through object
All living things are composed of cells
Cells are basic units of structure & function
All cells come from pre-existing cells
Cell Theory
Virus
Plasmodesmata
tiny channels between plant cells
cells can share molecules
plants & algae only
http://iws.ccccd.edu/biopage/BioLab/Unit%207/Elodea%20closeup.jpg

http://www.washington.uwc.edu/about/faculty/schaefer_w/TISSUES/cheek_cells1.jpg

http://sac.edu/HomePages/nigro_dan/Cheek_cell.jpg

http://www.microscopies.com/DOSSIERS/Magazine/Articles/WD-OIGNON/onion%20cell%20x312%20DIC-a.JPG

http://www.btinternet.com/~stephen.durr/onionnucleus.jpg

Cytoskeleton
7 min excellent review
internal cellular support
Full transcript