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
These are the primary structures for the processing and packaging of proteins for transport out of the cell.
golgi apparatus
Nucleoli are made up of ____ enzymes, and other proteins.
RNA
Which of the following cells have “storage” as one of their primary functions?
Fat cells
Lymphocytes
Liver cells
Epidermal cells
Lymphocytes
Liver cells
What are the types of passive transport?
Osmosis
Facilitated Diffusion
Simple Diffusion
Bulk Filtration
