Chapter 2 - Cells Flashcards
Proteins in the plasma membrane preform a variety of functions including ____?
Cell to cell regulation
Intercellular connection
Transport
Enzyme activity
Epithelial cells _____.
line internal surfaces of organs.
The ____ membrane forms the outer, limiting barrier separating the internal contents of the cell from the external environment.
plasma
One of the main factors that influence membrane permeability is ______.
concentration gradient
The cell structure known as the “gatekeeper” to regulate the passage of gases, nutrients and wastes.
plasma membrane
Simple diffusion of water is called ____.
osmosis
Examples of lipids include ____.
cholesterol
oils
fats
steroids’
Some membrane proteins catalyze (speed up) the rate of metabolic reactions. These proteins are acting as ____.
enzymes
The functions of human body cells are ____.
producing new cells
providing for defense
lining surfaces
making connections
The four major passive transport processes are simple ____, facilitated ____, osmosis, and bulk _____.
diffusion
diffusion
filtration
The tendency of molecules to move down their concentration gradient is ____.
diffusion
Proteins in the plasma membrane perform a variety of functions including ______.
transport
enzyme activity
intercellular connection
cell to cell recognition
______ is required for osmosis to occur.
a selectively permeable membrane
Endocytosis is _____ in reverse.
exocytosis
In diffusion, particles move until they are ______.
spread out evenly on each side of a membrane
In osmosis and simple diffusion, the net movement of molecules will continue until the concentration gradient no longer exists. This end point is called
_____.
equilibrium OR isotonic
An enclosed membrane sac formed through phagocytosis is called a ______.
vacuole
Osmosis is a type of ______.
diffusion
The term endocytosis ______.
includes phagocytosis and pinocytosis
The cytoplasm is the material between the plasma membrane and ______.
nucleus
Cytosol is ____.
the viscous fluid of the cytoplasm.
Phagocytosis means ____.
cellular eating
Pinocytosis is known as _____.
cellular drinking
The folds of the inner membrane of a mitochondrion are called ______.
cristae
