Unit 1 (Ch 3&4) Flashcards
voltage across the membrane
Membrane potential (allows signal to be transmitted quickly and faithfully over long distances)
cells come together and touch to recognize one another
Contact Signaling
plasma membrane receptors that bind to ligands
neuotransmitters, hormones, paracrines
Chemical Signaling
membrane enclosed specialized structures in the cell that perform specific functions for the cell
cell organelles
3 primary components of cytoplasm
- Cytosol
- Organelles
- Inclusions (substances that may or may not be present)
When a cell is at ___, it’s ion channels are close
Rest
Resting Membrane Potential
coating of sugar molecules that surrounds the cell membrane. Allows the cell to bind to another cell
glycocalyx
stacks of flattened sacs involved in the production of certain material
endoplasmic reticulum
Cellular material between the plasma membrane and the nucleus
Cytoplasm
Clear, semi fluid medium of the cytoplasm that the organelles float in
Cytosol
System of bumpy threads that weave through the nucleoplasm. Made up of DNA, histone proteins and RNA chains
Chromatin
Where the assembly of ribosomes begin
Nucleolus
Site of protein modification, tagging, packaging and transport
Golgi apparatus
“Mail room”
Contains enzymes that break down and digest unneeded cellular components. Digests foreign material
Lysosomes
“Garbage Pail”
Detoxify harmful substances and neutralize free radicals
Peroisome
