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34 terms

Apologia Biology Module #6 Flashcards

Exploring Creation With Biology Flashcards
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Cell Wall
A rigid substance on the outside of certain cells, usually plant and animal cells
Plasma Membrane
The semipermeable membrane between the cell contents and either the cell wall or the cells surroundings
Cytoplasm
A jellylike fluid inside the cell in which the organelles are suspended
Cytoplasmic Streaming
The motion of cytoplasm in a cell that results in coordinated movement of the cell's contents
Mitochondria
The organelles in which nutrients are converted into energy
Lysosome
The organelle in animal cells responsible for hydrolysis reactions that break down proteins, polysaccharides, disaccharides, and some lipids
Ribosomes
Non-membrane-bounded organelles responsible for proteins synthesis
Endoplasmic Reticulum
An organelle composed of an extensive network of folded membrane that performs several tasks within a cell
Rough ER
ER that is dotted with ribosomes
Smooth ER
ER that has no ribsomes
Leucoplasts
Organelles that store starches or oils
Chromoplasts
Organelles that contain pigments used in photosynthesis
Central Vacuole
A larger vacuole that rests at the center of most plant cells and is filled with a solution that contains a high concentration of solutes
Waste Vacuoles
Vacuoles that contain the waste products of digestion
Phagocytosis
The process by which a cell engulfs foreign substances or other cells
Phagocytic Vacuole
A vacuole that holds the matter which a cell engulfs
Pinocytic Vesicle
Vesicle formed at the plasma membrane to allow the absorption of large molecules
Secretion Vesicle
Vesicle that holds secretion products so that they can be transported to the plasma membrane and released
Golgi Bodies
The organelles where proteins and lipids are stored and then modified to suit the needs of the cell
Microtubules
Spiral strands of protein molecules that form a tubelike structure
Nuclear Membrane
A highly-porous membrane that separates the nucleus from the cytoplasm
Chromatin
Clusters of DNA,RNA, and proteins in the nucleus of a cell
Cytoskeleton
A network of fibers that holds the cell together, helps the cell to keep its shape, and aids in movement
Microfilaments
Fine, threadlike proteins found in the cell's cytoskeleton
Intermediate Filaments
Threadlike proteins in the cell's cytoskeleton that are roughly twice as thick as microfilaments
Phospholipid
A lipid in which one of the fatty acid molecules has been replaced by a molecule that contains a phosphate group
Passive Transport
Movement of molecules through the plasma membrane according to the dictates of osmosis or diffusion
Active Transport
Movement of molecules through the plasma membrane (typically opposite of osmosis or diffusion) aided by a process that requires energy
Isotonic Solution
A solution in which the concentration of solutes is essentially equal to that of the cell which resides in the solution
Hypertonic Solution
A solution in which the concentration of solutes is greater than that of the cell that resides in the solution
Plasmolysis
Collapse of a walled cell's cytoplasm due to the lack of water
Cytolysis
The rupturing of a cell due to the excess internal pressure
Hypotonic Solution
A solution in which the concentration of solutes is less than that of the cell that resides in the solution
Activation Energy
Energy necessary to get a chemical reaction going