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Chapter 3

Cellular Level of Organization

TermMeaning
Cells the living structural and functional units enclosed by a membrane
cells arise from ______________. Existing cells by cell division
what does selective permeability mean? allows only certain substances to enter or exit the cell
what is the cytoplasm? the fluid portion of the cell
where is the cytoplasm? between the plasma membrane and the nucleus
what is the fluid of the cytoplasm called? cytosol
what structures are contained in the cytoplasm? organelles
what are characteristics of organelles? have characteristic shapes and specific functions
what are some examples of organelles? cytoskeleton, ribosomes, endoplasmic reticulum, gogli complex, lysosomes, peroxisomes, mitochondrion
what is the nucleus? the largest organelle in the cell
what does the nucleus contain? most of the cells DNA, 46 chromosomes, genes
what is a chromosome? a single DNA wound around proteins
what are genes? the hereditary units that control most aspects of cellular structure and funtion found in the DNA
what is the lipid bilayer? basic framework of the plasma membrane made up of back to back layers of 3 parts of lipid molecules
what are the three types of lipid molecules? phospholipids, cholesterol, glycolipid
what contains 75% of membrane lipid? phospholipid
what is the phospholipid made of? head made of phosphate, and tail made of lipid
is the phospholipid head hydrophilic or hydrophobic? and why hydrophilic, the head is made of phosphate and loves water
is the tail hydrophilic or hydrophobic? and why hydrophobic, the tail is made of lipid (fat) and hates water
Name the parts of a cell plasma mebrane, cytoplasm, nucleus
what is the plasma membrane flexible outer surface seperating cell's internal environment from the external environment
Created by: JCrawford2580
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