Flashcards in Exam 1 Slide Show (Cells) Pt 1 Deck (20):
Continuity of life has a _____ basis
What builds tissue and organs?
Cells generally have
Plasma membrane, nucleus, cytoplasm (cytosol, organelles, inclusions)
What one cell type best represents the theoretical cell?
There are over ____ different types of cells
What is the plasmalemma?
A plasma membrane can be observed with?
Electron microscope ( too thin for a light microscope)
What describes a phospholipid bilayer with associated integral and peripheral proteins?
What is the structural model of the plasma membrane?
The fluid mosaic model
What type of membrane provides the cell with cell movement, growth, division, and self-sealing if torn or puncture?
A fluid membrane (plasma membrane)
How do membrane lipids affect the movement of materials across the membrane?
By allowing passage of many lipid-soluble substances but providing a barrier to charged or polar substances
I order from greatest to least, what does the lipid bilayer membrane consist of?
Phospholipids (75%), Cholesterol (20%), and Glycolipids (5%)
The bilayer occurs because lipids are_____
amphipathic (having polar and non-polar )
Inside the lipid bilayer, what mediates membrane fluidity?
What makes the lipid bilayer less fluid (stronger) at normal body temperatures and increases membrane fluidity at lower temperatures?
Membrane proteins are classified as either ______ or ______
Integral or peripheral
What are determiners of many of the membranes functions and give distinguishable characteristics?
Which proteins extend through or well into the bilayer?
Integral proteins (amphipathic like lipids)
What forms ion channels and transporters?
Integral proteins with channel proteins (form ion channels) and carriers (transporters)