Bio 235 Chapter 4 Athabasca Exam Questions and Answers 100% Pass

Bio 235 Chapter 4 Athabasca Exam Questions and Answers 100% Pass Types of tissue - 1. Epithelial Tissue 2. Connective Tissue 3. Muscle Tissue 4. Nervous Tissue Cell junction types - gap junctions, tight junctions, desmosomes and hemidesomoes tight junctions - weblike strands of transmembrane proteins that fuse together the outer surfaces of adjacent plasma membranes to seal off passageways between adjacent cells 2 100% Pass Guarantee Katelyn Whitman, All Rights adherens junctions - contain plaque, a dense layer of proteins on the inside of the plasma membrane that attaches both to membrane proteins and to microfilaments of the cytoskeleton. Cadherins Desmosomes - cadherins+plaque. keratin. Prevent epidermal cells from separating Hemidesmosomes - attach epithelial cells to the basement membrane gap junctions - provide cytoplasmic channels between adjacent animal cells, connexions Epithelial Tissue VS. Connective tissue - 1. Epithelial has many packed cell compare to connective tissue 2. Epithelial cells don't have blood or nerve supply Structure of Epithelial Tissue - 1. Apical(surface) free, may contains cilia 2. Lateral surface, faces adjacent cells. has, tight junction, adherin junction, desmosomes and gap junction 3.Basal surface, basement layer 3 100% Pass Guarantee Katelyn Whitman, All Rights Basement layer - area between the epithelium and the underlying connective tissue Basement layer made up of - 1. Basal Lamina, contains collagen and lamina 2. Reticular Lamina, contains lamina from fibroblast avascular - no blood vessels Epithelial divides into two groups - 1. covering/lining 2. glandular (secretion) Arrangement of cell in layer - Simple epithelium