PET-3322 Lecture Notes - Lecture 1: Osteoclast, Skeletal Muscle, Elastic Fiber
Document Summary
Plasma membrane: forms the outer boundary of the cell, through which the cell interacts with its external environment. Functions as a boundary separating the substances inside the cell (intracellular) and from substances outside the cell (extracellular) 50%lipids, 50%proteins, 4%carbs: carbs combine with lipids to form glycolipids and with proteins to form glycol proteins. Nucleus: usually located centrally; it directs cell activities, most of which take place in the cytoplasm. Cytoplasm: located between the plasma membrane and the nucleus. Phospholipids: readily assemble to form a lipid bilayer. Lipid bilayer: a double layer of phospholipid molecules with a polar head and a nonpolar tail. Hydrophilic: water-loving, heads are exposed to the water. Tissues: collections of specialized cells and the extracellular substances surrounding them. Classified into four types based on structure of the cells, the composition of extracellular matrix and the functions of the cells. Four types- epithelial tissue, connective tissue, muscle tissue, nervous tissue. Extracellular matrix: the non-cellular substances surrounding the cells.
