12 questions
The cell membrane is _______________ permeable.
selectively
somewhat
physically
ionically
The cell membrane is mostly made of what?
Membrane-spanning Proteins
Surface Proteins
Phospholipids
Carbohydrates
What are the two parts of a phospholipid?
head
enzyme
tail
hormone
What forms due to the two layers of phospholipids coming together?
trilayer
bilayer
unilayer
The phospholipid head is _____________ & _____________
Hydrophilic
Hydrophobic
Polar (+)
Uncharged
The phospholipid tail is _____________ & _____________
Hydrophilic
Hydrophobic
Polar (+)
non-polar
What general type of protein assist in moving specific particles across the membrane?
Membrane-spanning
Surface
Cholesterol
Carbohydrates
General term for proteins that reside on the either the exterior or interior surface of the plasma membrane.
Membrane-spanning
Small- Surface protein
Cholesterol
Carbohydrates
are proteins that carry substances from one side of a biological membrane to the other
carrier protein
channel protein
receptor protein
An embedded protein in the cell membrane, providing a hydrophilic passageway for small, polar ions.
carrier protein
channel protein
receptor protein
Located on the cell membrane surface, nucleus membrane or other cellular organelle membrane - they can bind to corresponding proteins to initiate cellular signaling pathways (reactions).
carrier protein
channel protein
receptor protein
A property of cellular membranes that only allows certain molecules to enter or exit the cell. This is important for the cell to maintain its internal order irrespective of the changes to the environment
selective permeability
hydrophilic
hydrophobic
selective durability