Module 4 Flashcards
(38 cards)
A ___ is the basic unit of all living things
Cell
Describe Eukaryotic cells
Complex cells with a membrane-bound nucleus & subcellular structures
All fungi, plants, and animals(including humans) are ___
Eukaryotes
Describe prokaryotic cells
- Simple cells
- most are unicellular organisms
Cells are organized into what two things?
Tissues & organs
What’s a plasma membrane?
A covering that regulates what comes into or leaves from the cell
What’s cytoplasm made up of?
Mixture or water, salts, proteins, & organelles
What’s the nucleus?
The control center of the cell
What’s the cytoplasm
A gelatin-like substance, plus structural fibers and organelles(but not the nucleus)
4 functions of the plasma membrane
1) covers and protects the cell
2) controls what goes in and out
3) links to other cells
4) tells other cells who it is
2 functions of cytoplasm & 2 things that cytoplasm is compromised of
1) gives cell it’s shape
2) contains structural(cytoskeleton) proteins
1) organelles except nucleus
2) cytosol
Where is the genetic information stored in a cells
Nucleus
What is the blueprints for the cells of the body?
DNA
What are somatic cells?
Those that are not part of the reproductive system which includes sperm & egg
RNA is made in ______
The nucleus
RNA is exported into the ____
Cytoplasm
What makes proteins in the cell?
RNA
What’s the fluid-mosaic model?
- lipid “sea” with protein “icebergs” floating in it
- proteins are integral or peripheral
What does integral mean
Embedded in bilayer, go from one side to the other (transmembrane proteins)
What does peripheral mean in terms of cells?
Associated with inside or outside of cell
Describe inside peripheral
Link cytoskeleton to membrane
Describe outside peripheral
Link cell to connective tissue or to other cells
Plasma membrane looks like ______
2 parallel lines 80 nm apart
In terms of the plasma membrane, what do the parallel lines, which are polar head groups, bind to?
Osmium atoms…which are used as a stain in electron microscopy
