What Is an Engineering Notebook?
Why Keep an Engineering Notebook?
Who Keeps an Engineering Notebook?
Engineering Notebook Sections
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What Is an Engin
Structurally, plant and animal cells are very similar because they are both eukaryotic
cells. They both contain membrane-bound organelles such as the nucleus,
mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes, and
Structures Responsible for Membrane Transport
We have discussed how the lipid bilayer acts as an efficient barrier by only allowing a
very small number of non-polar molecules to freely enter or exit a cell. While for the
most part this sele
In addition to the lipid bilayer, the cell membrane also contains a number of proteins. We
have already mentioned the presence of certain proteins in the cell membrane. In this
section we will discuss the different classes
The Lipid Bilayer
Lipid Bilayer Structure
The lipid bilayer is a universal component of all cell membranes. Its role is critical
because its structural components provide the barrier that marks the boundaries of a
cell. The structure is cal
Cell wall - The thick and rigid layer that covers the plasma membrane in plant cells.
Composed of fat and sugar molecules in a matrix.
Chlorophyll - A pigment located within a chloroplast that absorbs light in
Introduction to the Cell
All living organisms are composed of cells. A cell is a small, membrane-bound
compartment that contains all the chemicals and molecules that help support an
organism's life. An understanding of the structure of cell
Intracellular Components Key Words
Actin - A very abundant protein in eukaryotic cells that is the main component of actin
Actin Filaments - Approximately 5-9 nanometers in diameter. Provide structural
support to the plasma membr
The Cytoskeleton and Cytosol
The cytoskeleton and cytosol are structural elements that help provide the cell with its
structure. The cytoskeleton is composed of protein filaments and is found throughout
the inside of a eukaryotic cell. The
Cell Membranes Key Words
Active transport - The transport of molecules across a membrane and against their
natural flow; mediated by carrier proteins and requiring outside energy.
Carrier protein - A protein responsible for mediating the ac
Unlike eukaryotic cells, prokaryote cells lack membrane-bound organelles. However,
whereas prokaryote cells are less structurally complex than eukaryotes, they are more
chemically complex, since all of the prokaryote cell'