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CH 2 The Cell (CN)


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The _____ is the basic functional unit of all living things.
The ________ seperates internal metabolic events from the externnal environment and controls the movement of materials into and out of the cell.
Plasma membrane
The plasma membrane is composed of _____________
Phospolipid bilayer
The phospholipid bilayer is seclectively ____________
What can freelly cross the plasma memembrane?
Small, uncharged polar molcules, (H2O & CO2) and hydrophobic molecules--nonpolar molecules such as O2 and lipid solubel molecules (hydrocarbons).
The plasma membrane contains:
__________provide passageways through the membrane for certain hydrophilic substances such as polar and charge molecules.
Channel Proteins
_______ is the energy source for transport across the membrame
__________are bodies within the cytoplasm that serve to physically seperate the various metabolic activities within cells.
Define ER
Endoplamic Reticulum, consists of stackes of flattened sacs involved in the production of various materials.
Golgi apparatus functions?
to modify and package proteins and lipids into vesicles
Define lysosomes
are vesicles from the golgi that contain digestive enzyems. They break down food and cellular debis and foreign invaders.
Define mitochondria
carry out aerobic respiration, in which energy (in the form of ATP) is obtained from carbohydrates
Name the 3 types of cell junctions
1. Desmosomes (protein attachments)
2. Tight junctions (tightly stitched seams)
3. Gap junctions (narrow tunnels)
Name the types of transport
1. Passive transport
2. Active transport
Name the types of Passive Transport
1. Osmosis
2. Dialysis
3. Facilitated diffusion
Name the mechanisms of Active Transport
1. Transport protein
2. vesicle Transport
a. Exocytosis
b. Endocytosis
c. Phagocytosis
d. Pinocytosis
e. Receptor mediated endocytosis

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