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18 Cards in this Set

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What is the plasma membrane composed of?
phospholipids
proteins (between phospholipid layers)
other molecules
What are the functions of the plasma membrane?
*regulates when enters and leaves cell
*communicates thru receptor proteins
*identifies itself with marker proteins
*chemical reactions
Receptor Proteins...
receive messages through chemicals
Marker Proteins...
determine "self" and "non-self"
Cytoplasm...
cytosol (liquid) - water, dissolved nutrients, enzymes, and other molecules
Organelles
Ribosomes
sites of protein synthesis, tens of thousands in each cell
Cytoskeleton provides
shape
movement: in cell (like a railroad track) and out of cell (like a blob)
genetic disorder relating to cytoskeleton
spherocytosis - RBCs balloon out and can't fit in the right places
The nucleus is composed of...
DNA and proteins (histones)
A gene is
the section of the DNA that contains instructions for a protein
Locus
the specific location on a chromosome

i.e. the locus for eye color
Allele
alternate forms of the same gene
functions of endoplasmic reticulum
1- molecule modification
2- molecule synthesis
3- storage of substances and transport
vesicle
transports within cells, usually solids
vacuole
transparts within cells, usually liquids
the endoplasmic reticulum is..
composed of folded membrane and most of its proteins are enzymes for chemical reactions
the golgi body is
stacks of elongated membrane sacs and has enzymes
the golgi body's funtions are...
1- molecule modification
2- molecule synthesis
3- storage and transport