Transcript 3.2 Cell Organelles LEQ

3.2 Cell Organelles
LEQ:
• How does the cytoplasm and cytoskeleton support cell
function?
• Reading 3.2, 12.4 (evolution of mitochondria, chloroplasts
only)
• Test Monday; projects friday
•
Activator:
What’s in my head?...about transport across membranes
•
Key terms – cytoskeleton, cytoplasm
•
3.2 Cell Organelles
The cytoplasm is the fluid-filled space between the cell
membrane and the nucleus.
• Metabolic reactions take place here
– Metabolic pathways
• Diffusion of reactants, ions, etc.
• Positioning of the nucleus, organelles, etc.
• Cytoskeleton, vesicle traffic
3.2 Cell Organelles
Examples of simple metabolic pathways
3.2 Cell Organelles
Pathways can be classified as anabolic or catabolic
3.2 Cell Organelles
Transport, feedback controls how metabolic pathways
operate
3.2 Cell Organelles
Eukaryotic cells have an internal structure.
• The cytoskeleton is a protein network that has many
functions:
– supports and shapes cell membrane
– helps position organelles
– vesicle movement
– assists in cell division
– aids in cell movement
• Bacteria
3.2 Cell Organelles
Vesicles can transport chemicals in bulk from the
membrane
3.2 Cell Organelles
Summary:
• What are some functions of the cytoplasm?
• What are the functions of the cytoskeleton?