BIOL 109 Lecture Notes - Lecture 7: Endoplasmic Reticulum, Extracellular Fluid, Nuclear Pore
Document Summary
Cells are the building blocks of all plants and living animals. All cells come from the division of pre-existing cells. Cells are the smallest units that carry out life"s essential physiological functions. Each cell must maintain homeostasis at the cellular level. Sex cells are either sperm of the males or oocytes for eggs of females. Somatic cells or body cells include all other cells in the human body. Cell or plasma membrane - outer boundary of a cell. Physical isolation the cell membrane is a barrier that separates the inside of the cell (cytoplasm) from the outside. Structural support specialized connections between plasma membrane are membranes and extracellular materials gives tissues stability. The plasma membrane is a phospholipid bilayer because the phospholipid molecules in its form two layers. Integral proteins are part of the plasma membrane structure and cannot be easily separated from it.
