ANIMAL CELL and It’s Functions
ANIMAL CELL:
About animal cell usually have an irregular shape.
are eukaryote cells, or cells with a membrane bound nucleus.
DNA is housed within the nucleus.
Also contain other membrane
bound organelles, or tiny cellular structures that carry out specific functions necessary for normal cellular operation.
smaller than plant cells.
Cell Membrane
is the outermost component of a cell. it is composed of 55% proteins, 25% phospholipids, 13% cholesterol, 3% carbohydrates, and 4% other lipids. encloses the cytoplasm and forms the boundary between material inside and materials outside it. it is semi-permeable, which means it regulated the flow of materials such as ions and molecules from going in and out of the cell. The Fluid Mosaic Model
describes the plasma membrane of animal cells. membrane that surrounds these cells has two layers (a bilayer) of phospholipids (fats with phosphorous attached), which at body temperature are like vegetable oil (fluid). the structure of the plasma membrane supports the old saying, “Oil and water don’t mix.” involved in the transport of small molecules either by active or passive means and large molecules through membrane flow.
Hydrophilic water loving
polar, phosphate
containing ends of the phosphate lipids.
face the extracellular and intracellular fluids of the cell.
Hydrophobic water fearing
Non-polar, fatty acid ends of the phospholipids. face away from the fluid on either side of the membrane, toward the center of the double layer of phospholipids.
Cell Coat or Glycocalyx found at the periphery of some animal cells. composed of mucopolysaccharides, glyolipids and glycoprotein's.
important in cell adhesion and cell to cell recognition. responsible for tissue organization.
Cytoskeleton consists of proteins that support cell, hold organelles in place, and enable the cell to change shape.
Protein structures are: