Essential Cell Biology Chapter 20 Exam Questions with Latest Update

Epithelial Tissue - ANSWER-Tissue lines and covers; densely packed cells, some specialized Connective Tissue - ANSWER-Tissue with few cells, much extracellular matrix Muscle Tissue - ANSWER-Tissue that's skeletal, smooth, cardiac Nervous Tissue - ANSWER-Tissue for neurons and glial cells Organs - ANSWER-Four tissues combined and organized form Human Skin - ANSWER-Largest organ with all 4 tissue types Digestive Tract - ANSWER-Contains epithelial, connective, and muscle tissue Extracellular Matrix - ANSWER-- organized by a network of extracellular material - secreted by cells and stays closely associated with cells Collagen - ANSWER-- most abundant protein in the body - triple helix, strong, tough fibers - primary component of connective tissues Fibroblasts - ANSWER-Make collagen and arrange it Pro-collagen - ANSWER-Secreted collagen Collagen Organization - ANSWER-scab > skin surface > epidermis > scar tissue > dermis Diseases of Collagen Synthesis - ANSWER-- osteogenesis imperfection - ehlers-danlos syndrome - menkes syndrome - scurvy Ehlers-Danlos Syndrome - ANSWER-- genetic defect in collagenase results in skin that is abnormally stretchy and lacks tensile strength - hypermobile joints Osteogenesis Imperfecta - ANSWER-- caused by defect in type I collagen - extremely fragile bones and thin skin - weak tendons