BI 234 FIRST MIDTERM EXAM OUTLINE EXAM
QUESTIONS AND ANSWERS WITH COMPLETE
SOLUTIONS
Feedback mechanism
Process that regulates a system based on its output
Negative feedback
Feedback that opposes the initial change and maintains homeostasis
Positive feedback
Feedback that amplifies the initial change and moves away from homeostasis
Epithelia
Tissue that covers body surfaces and lines body cavities
Simple Squamous
Epithelial tissue with a single layer of flat cells- disc nuclei
Location: air sacs, lining of heart & blood vessels, lining of body cavity, kidney glomeruli
Function: filtration,
Endothelium
Epithelium lining lymphatic vessels, blood vessels, and heart
Connective Tissue
, Most abundant and widely distributed tissue type
Function of connective tissue
Binding and support, Protection, Insulation, Transportation
Ground substance
Medium through which solutes diffuse between blood capillaries and cells.
Serves as CT glue
Collagen (white fibers)
Strongest and most abundant type of fiber in connective tissue; Provides high tensile
Strength
Elastic Fibers
Networks of long, thin, elastin fibers that allow for stretch
Reticular
Short, fine, highly branched collagenous fibers in connective tissue
Mesenchyme
Common tissue of origin for connective tissues
Vascularity
Degree of blood supply in connective tissues
ground substance
Component of connective tissue with fibers and star-shaped mesenchymal cells- gel like
substance
Simple squamous
Epithelial tissue with a single layer of flat cells
Cuboidal
QUESTIONS AND ANSWERS WITH COMPLETE
SOLUTIONS
Feedback mechanism
Process that regulates a system based on its output
Negative feedback
Feedback that opposes the initial change and maintains homeostasis
Positive feedback
Feedback that amplifies the initial change and moves away from homeostasis
Epithelia
Tissue that covers body surfaces and lines body cavities
Simple Squamous
Epithelial tissue with a single layer of flat cells- disc nuclei
Location: air sacs, lining of heart & blood vessels, lining of body cavity, kidney glomeruli
Function: filtration,
Endothelium
Epithelium lining lymphatic vessels, blood vessels, and heart
Connective Tissue
, Most abundant and widely distributed tissue type
Function of connective tissue
Binding and support, Protection, Insulation, Transportation
Ground substance
Medium through which solutes diffuse between blood capillaries and cells.
Serves as CT glue
Collagen (white fibers)
Strongest and most abundant type of fiber in connective tissue; Provides high tensile
Strength
Elastic Fibers
Networks of long, thin, elastin fibers that allow for stretch
Reticular
Short, fine, highly branched collagenous fibers in connective tissue
Mesenchyme
Common tissue of origin for connective tissues
Vascularity
Degree of blood supply in connective tissues
ground substance
Component of connective tissue with fibers and star-shaped mesenchymal cells- gel like
substance
Simple squamous
Epithelial tissue with a single layer of flat cells
Cuboidal
