B. Cell Structure and Function Flashcards
-encloses cell for support, protection and
passage of substances
-semi-permeable
-made up of phospholipid bilayer
Plasma Membrane
A describes the cell membrane as a tapestry of several types of molecules (phospholipids, cholesterols, and proteins) that are constantly moving. This movement helps the cell membrane maintain its role as a barrier between the inside and outside of the cell environments.
Fluid Mosaic Model
Describe Isotonic Solution
No osmotic flow
Red Blood Cell appear normal in size and shape
Describe Hypotonic Solution
Water flows into the cell
The swelling may continue until the plasma membrane ruptures, to lyses
Describe Hypertonic Solution
Water moves out of the cell
Red blood cells crenate (shrivel)
Cellular material outside the
nucleus but inside the
plasma membrane
Contains:
⮚ organelles
⮚ cytosol
Cytoplasm
A fluid portion of the cytoplasm. It is a viscous solution containing dissolved ions and molecules such as proteins
Cytosol
Control center of the Cell
Nucleus
________in the nucleus
provides the original information
needed to fulfill the cell’s needs
This nuclear information
contributes to \_\_\_\_\_,
\_\_\_\_\_\_\_\_, and the many
activities of the complex cell
“factory”
DNA
Growth, Differentiation
Stores hereditary information,
which is passed from cell to cell
as new cells are formed
Nucleus
Parts of the Nucleus
Nuclear Membrane
Nucleoplasm
Nucleolus
Chromatin
The pacemaker of the cell and where ribosomes are produced
Nucleolus
The nuclear sap
Nucleoplasm
It has the nuclear Pore
Nuclear Membrane
The complex of proteins and DNA
Chromatin
_______=little organs
Organelles
Membrane bound=_________
enclosed in a membrane
Enumerate all 7 membrane bound organelles
ER Golgi Complex Vacuoles and Vesicles Lysosome Peroxisome Mitochondria Plastids
Enumerate all 3 non-membrane bound organelles
Ribosome
Cytoskeleton
Cytoplasm
Continuous with the outer membrane
of the nucleus
Facilitates cellular communication
and channeling of materials
Extensive that it constitutes more
than half of the membranous
surfaces within the cytoplasm of
most cells
Endoplasmic Reticulum
Form of ER that has no or few ribosomes
Smooth ER
Associated with the synthesis, secretion, or storage of proteins
Rough ER
Collecting, packaging, and delivery centers or “post offices” of the cell
Golgi apparatus/Golgi Complex/Golgi Bodies
Modified products of the ER are contained in ________ (tiny, blisterlike bodies)
Small Vesicles
All proteins exported from the cell are processed in the _________
Golgi Apparatus
