Health Sciences 2300A/B Lecture Notes - Lecture 1: Cell Membrane, Cytosol, Organelle
2 Nov 2016
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Document Summary
3 principle parts of a cell: plasma membrane. Separates the cell"s internal environment from its external environment. Plays a key role in the communication between cells: cytoplasm. Consists of all the cellular contents between the plasma membrane and the nucleus. Has 2 components: cytosol - the uid portion of cytoplasm, also called intercellular uid, contains water, dissolved solutes and suspended particles. Ii. organelles (within the cytosol) - each has a characteristic shape and speci c functions: nucleus. A large organelle that houses most of a cell"s dna. Inside the nucleus, each chromosome (a single molecule of dna associated with several proteins) contains thousands of hereditary units called genes that control most aspects of cellular structure and function the plasma membrane: Surrounds and contains the cytoplasm of a cell. Its structure is described using the uid mosaic model. The proteins may oat freely or can be anchored to certain locations.
