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Med Term I Chap 2 Cell Parts
Cell Parts
10
Medical
Undergraduate 1
09/03/2010

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Term
cell membrane
Definition
structure surrounding & protecting the cell - it determines what enters and leaves the cell
Term
chromosomes
Definition

rod-shaped structures in the nucleus that contain regions of DNA called genes.

 

** there are 46 chromosomes (23 pairs) in every cell except for the egg & sperm cells, which contain only 23 individual, unpaired chromosomes

Term
cytoplasm
Definition
all the material that is ouside the nucleus and yet contained within the cell membrane
Term
DNA
Definition
chemical found within each chromosome - arranged like a sequence of recipes in code, it directs the activities of the cell
Term
endoplastic reticulum
Definition
structure (canals) within the cytoplasm - site in which large protiens are made from smaller portien pieces - anabolism takes place on teh ribosome of the endoplactic reticulum
Term
genes
Definition
regions of the DNA within each chromosome
Term
karyotype
Definition
picture of chromosomes in the nucleus of the cell - the chromosomes are arranged in numerical order to determine their number & structure
Term
metabolism
Definition
the total of the chemical process in a cell - it includes catabolism & anabolism
Term
mitochondria
Definition
structures in the cytoplasm in which foods are burned to release energy - catabolism takes place in mitochondria
Term
nucleus
Definition
control center of the cell - it contains chromosomes & directs the activities of the cell
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