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Unit 1 - Cellular
N/A
43
Physiology
Undergraduate 1
01/25/2011

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Term
3 Classes of Muscle Cells
Definition
1. skeletal
2. cardiac
3. smooth
Term
Skeletal & Cardiac Muscle
Definition
Striated/used for "force and tension"
Term
Smooth Muscle
Definition
Found in blood vessels, GI tract, bronchioles, etc.
Controls activity & movement of body fluids.
Term
Nerve Cells
Definition
Control activity of an organ or system
Term
Epithelial Cells (Location & Purpose)
Definition
*Located at the surfaces or line the walls of tubular and hollow structures
*Regulate movement of molecules
Term
Connective-Tissue Cells
Definition
*Connects cells to tissue to organs to systems
*Include fat-storing cells, bone cells, red & white blood cells
Term
Matrix (Connective-Tissue Cells)
Definition
Molecules secreted by connective-tissue cells that hold tissues together
Term
Extracellular Matrix Consists Of... (3)
Definition
1. collagen fibres
2. elastin fibres
3. reticular fibres
Term
Extracellular Fluid
Definition
Fluid outside of cell; makes up 80% of cell environment
Term
Interstitial Fluid
Definition
Fluid within the tissue but outside of the cell; makes up 20% of cell environment; mostly plasma
Term
Intracellular Fluid
Definition
Fluid inside the cell
Term
Atoms
Definition
Units of matter that form all structures.
-protons (+)/neutrons (neutral)/electrons (-)
Term
Molecules
Definition
2 or more atoms
Term
Covalent Bond
Definition
2 electrons shared between 2 atoms
Term
Polar Bond
Definition
electron pairs not always shared equally between atoms (example: H20/water)
Term
Water Tension
Definition
The attraction between water molecules.
Term
pH
Definition
Regulator in ventilation
Determined mainly by the concentration of hydrogen atoms (H) in the fluid
Term
pH formula
Definition
pH = -log10[H+]

[H+] = concentration of H ions
Term
Alkalosis
Definition
pH greater than 7.5
decrease in H ions
increase in pH
Term
Acidosis
Definition
pH less than 6.8
increase in H ions
decrease in pH
Term
pH of most body fluids
Definition
6.8 - 7.8
Term
pH of intracellular fluids
Definition
7.0 - 7.2
Term
pH of extracellular fluid
Definition
7.35 - 7.45
Term
Hydrophilic
Definition
Molecules with polar bonds that can dissolve in water
Term
Hydrophobic
Definition
Molecules with NO polar bonds that CAN'T dissolve in water
Term
Amphipathic
Definition
Molecules with both a polar and non-polar group that form clusters in water. Polar head faces the water while the non-polar tails are on the inside, protected by the water.
Term
Carbohydrates
Definition
Major Source of Energy
Monosaccharides(glucose)
Polysaccharides(starch)
Complex Polysaccharides(cellulose)
Term
Monosaccharides
Definition
Used to make ATP (ex: glucose used to synthesize ATP)
Term
Glycogen
Definition
Carbohydrates are converted to glycogen when ATP supplies made from glucose are sufficient. Made of 22 mols of glucose or fats & stored as adipose tissue.
Term
Polysaccharides
Definition
Formed by plants, broken down during digestion to form glucose. Ex: starch
Term
Complex Polysaccharides (Fibre)
Definition
Cellulose formed by plants that we are unable to digest.
Term
Lipids
Definition
Neutral fats = fat when solid/oil when liquid. Made of fatty acids and glycerol.
Term
Glycerol Phosphate
Definition
Glugose that has been taken up by adipocytes and transformed.
Term
Triacylglycerols
Definition
Glycerol combined with fatty acids.
Term
Fatty Acids
Definition
Chains of hydrogen and carbon.
Term
Saturated Fatty Acids
Definition
All carbons have a single bond. Solid at room temperature. Animal fats.
Term
Unsaturated Fatty Acids
Definition
1 or more double bonds. Liquid at room temperature. Plant fats. (monounsaturated and polyunsaturated)
Term
Phospholipids
Definition
Glycerol+2 or 3 fatty acids+a phosphate group. Make up cell membrane bilayers.
Term
Eicosanoids
Definition
"Messengers" - responsible for clotting, inflammation, and labor contractions.
Term
Steroids
Definition
Component of membrane structure and chemical messengers. Precursor to various hormones.
Term
Lipoproteins
Definition
Transport fatty acids and cholesterol in the blood.
Term
High Density Lipoprotein (HDL)
Definition
Helps remove cholesterol by transporting it to the liver where it is excreted in bile.
Term
Low Density Lipoportein (LDL)
Definition
Causes high cholesterol and plaque build up by transporting cholesterol to the peripheral tissues to be stored.
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