AP BIO Chapter 6

AP biology flash cards

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Actin
A globular protein that links into chains, two of which twist helically about each other, forming microfilaments in muscle and other kinds of cells
Basal body
Anchors the cilium or flagella to the cell, structure is identical to that of a centriole
Cell wall
Found in prokaryotes
Plants: protects the cell, maintains shape, prevents to much water intake
Central vacuole
Stockpiling proteins
disposing of metabolic byproducts
holding pigments
storing defensive compounds
Tonoplast is the membrane that surronds it
Centriole
A structure in the contrsome of an animal cell composed of a cylinder of microtuble triplets arranged in a 9+0 pattern
Centrosome
Present in cytoplasm of animal cells
important for cell division
contains two centrioles
Chloroplast
Organelle found in plants
site for photosynthesis
Chromatin
Fibrous material that makes chromosomes
Chromosome
Contains genes in form of DNA
Celium
A short cellular appendage containing microtubules. A motile cilium is specialized for locomotion and is formed from a core of nine outer doublet microtubules and two inner single microtubules (the “9 + 2” arrangement) ensheathed in an extension of the plasma membrane. A primary cilium is usually nonmotile and plays a sensory and signaling role; it lacks the two inner microtubules (the “9 + 0” arrangement
Contractile vacule
Found in fresh water protists, pump excess water out of the cell to maintain the appropriate concentration of sales
Crista
Infoldings located in the inner membrane of mitochondria
Cytoplasm
Region between nucleus and plasma membrane
is eukaryotic cells this region houses membrane-bound organelles
Cytoplasmic streaming
circular flow of cytoplasm, involving myosin and actin filaments, that speeds the distribution of materials within cells.
Cytoskeleton
Provides mechanical supprots
maintains cell shape
provides anchorage for many organelles