UCONN PNB 2264 Exam 1 Latest Update Graded A+

UCONN PNB 2264 Exam 1 Latest Update Graded A+ Homeostasis "Dynamic steady state" Narrow limits and fluctuations around the "set point" % of Intracellular fluid in the body 67% % of Extracellular fluid in the body Interstitial fluid (26%) Blood Plasma (7%) The Four Tissue Types Epithelial, Connective, Muscle, Nervous Epithelial Tissue 1. Covers exposed surfaces 2. Lines internal passageways 3. Forms glands Hydrogen and Oxygen combine via: Polar Covalent Bonds Hydrogen's Importance to Life - Is a solvent - It Ionizes to form Electrolytes - Has a high heat capacity - Lubrication - Cushioning What does Hydrolysis do? Reverses the steps of dehydration synthesis Electrolytes - Hydrogen (H+) - Sodium (Na+) - Potassium (K+) - Chlorine (Cl-) - Magnesium (Mg2+) - Calcium (Ca2+) Functions of Epithelial Tissue - Protection - Exchange - Secretion - Absorption Characteristics of Epithelial Tissue - Presence of CELL JUNCTIONS - Polarity of the apical and basal surfaces - Attachment of the Basal Lamina to the Basement Membrane - Avascularity - Regenerative What is the purpose of the Basement Membrane? Attaches epithelial tissue to connective tissue Types of Intracellular Junctions: - Desmosomes - Hemidesmosomes - Tight Junctions: No space - Gap Junctions: Space Desmosomes Cell to CELL Hemidesmosomes Cell to BASEMENT MEMBRANE Epithelium by LAYERS - Simple - Stratified Epithelium by SHAPES - Squamos - Cuboidal - Columnar Connective Tissue is made up of: - Cells - Non-living extracellular matrix Functions of Connective Tissue - Binding - Support - Protection - Insulation Connective Tissue consists of specialized cells: - Fibroblasts: Make fibers - Chondroblasts: Cartilage - Osteoblasts: Bone Matrix determines function and is made up of: - Protein Fibers - Polysaccharide ground substance