COHN 319 Exam 1 Questions and Answers All Correct
What is a tissue? - Answer-lump/sheet of identical cells linked together
4 types of tissue - Answer-nervous, muscle, connective, epithelial
Histology definition - Answer-microscopic study of tissues typically below 1,000x magnification
Cyt...
What is a tissue? - Answer-lump/sheet of identical cells linked together
4 types of tissue - Answer-nervous, muscle, connective, epithelial
Histology definition - Answer-microscopic study of tissues typically below 1,000x
magnification
Cytology - Answer-Histology using Electron microscopy 1,000x to 1,000,000x allowing
for intracellular ultrastructure
Integrated anatomy and physiology - Answer-overview of link between structure and
function
Elements - Answer-Pure substances made up of pure atoms of element
Atom - Answer-Smallest unit of element still retaining properties
Four main elements - Answer-carbon, hydrogen, oxygen, nitrogen
Macromolecules - Answer-Lipids, carbs, proteins, and nucleic acids
Organ seen at gross anatomical level composed of two tissues may: - Answer-Have
overlapping function
Bladder(urinary/excretory system) - Answer--Composed of smooth muscle
-Cells are capable of shortening producing force forcing urine out(urge to pee)
-Stretch receptors present in urethra signal brain
-Signal gets stronger and stronger
-Sphincter muscles force out
-Muscle in bladder up against connective tissue
-Bladder tissues embedded within wall(epithelium, connective, and smooth muscle
tissue)
-Connective tissue(elastin fibers) allow stretching
, -Bladder must be tough(connective tissue; collagen)
-Epithelial tissue lines surfaces
-Transitional epithelium(expand and contract) serves bladder structure and function
Kidneys - Answer--Take high pressure blood and filter small molecules(ions;
nitrogenous waste; uric acid; creatinine and excess water)
-Blood/body sodium concentration regulated through urine
-Smooth muscle contraction encourages movement from kidney to bladder
-Structure allows for selective permeability
-Kidney/bladder collaborate
Every tissue type - Answer--Exists as aggregations of identical cells in sheets/lumps
-Has range of specific shapes, sizes, thickness, and intercellular connections
-has unique distribution pattern throughout the body
Histopathology definition - Answer-Study of disease using microscopy(compared to
normal tissue)
Histopathology examples - Answer-Growth on skin present, dermatologist takes biopsy,
gives to histopathologist who determines whether tissue is benign or malignant; stage
and type of disease
Blood drawing is an example of biopsy as blood is tissue containing microscopic
components
Anatomy(structure) and physiology(function) are: - Answer-Linked
Lungs - Answer-Elastin fibers allow stretch and expansion
-cardiovascular; respiratory system O2 diffusion
-Air is humidified maximizing absorbtion into circulatory system
-Branched structure(300-400 millions of alveoli) maximize surface area/diffusion
-Alveoli is smallest functional unit of lung
Alveoli - Answer--Sack of squamous cell epithelial tissue(flat/one cell thick)
-Surrounded by capillaries with endothelial cells lining capillary wall
-Interstitial fluid in between cells
interstitial fluid - Answer--Allows gas exchange(CO2) to take place maximizing speed
and eficiency of transfer
-Extracellular fluid in between cells(ions w/water)
O2 pathway through lungs - Answer-endothelial cell, interstitial fluid, across capillary
epithelial tissue - Answer--Lines/maximizes surface area of body surfaces and cavities
-Attatched to basement membrane(basal end of tissue)
-Serves mechanical protection and as barrier to small particles
-Facilitates transfer of O2 and CO2
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