Shared Flashcard Set

Details

the body fluids
exam 4
36
Anatomy
Undergraduate 2
04/25/2013

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Cards

Term
lean adults
Definition

female-55% fluids, 45% solids

males-60% fluids, 40% solids

Term
intracellular (ICF)
Definition

w/i cells

2/3rds

Term
extracellular (ECF)
Definition

in body cavity, 1/3rd

 

Term
interstitial fluid
Definition

surrounding cells

80%

Term
plasma
Definition

component of blood 

20%

Term
fluid dynamics
Definition
movement of fluid beteen divisions
Term
osmosis
Definition
between interstitial and intracellular
Term
capillary exchange
Definition
btw plasma and interstitial
Term
barriers
Definition

plasma membranes-seperate intracellular from interstitial

BVs sepereate interstitial fluid from plasma

 

Term
water gain
Definition
  • component
  • preformed=ingested water
  • food (700 ml) or drin 1600 ml 
  • total 2300 ml/day

metabolic

  • components
  • water produced during aerobic respiration (electron transport)
  • total 2500 ml
Term
water loss
Definition
  • urination (kidneys)= 1500 ml
  • skin evaporation/sweat=600 ml
  • defecation-GI tract=100 ml
  • exhalation=300 ml
Term
electrolytes
Definition

dissolved minerals

functions: control osmosis; regulate pH

Term
anions
Definition
negatively charged electrolytes (Cl-)
Term
cations
Definition
positively charged electrlytes (Na-,H+)
Term
osmosis review
Definition

movement of water

intracellular and interstitial fluids-osmolarity has to be equal to prevent shrinking or swelling of cells

 

Term
isotonic solution
Definition
osmolarity are equal
Term
hypotonic solution
Definition
cause cells to swell bc gain water
Term
hypertonic solution
Definition
causes cells to shrink due to water loss
Term
regulation of water
Definition

increases losses via urination, perspiration etc

generates dehydration

response of body

Term
regulationof electrolytes
Definition

via hormonal secretion

inkidneys-regulate amount loss in urine

Term
aldosterone
Definition
causes increased levels of Na+, Cl-, & Mg2+ in body fluids and decreased levels of K+
Term
Angiotenisin II
Definition
increase reabsorption of Na+, Cl-. and H20 (decrease urine loss)
Term
atrial nutriuretic
Definition
increase urine execretion of Na+, Cl- (&H2O) - decrease BV
Term
in tissues
Definition
hormones regulate storage/release of electrolytes
Term
calcitonin
Definition
storage of Ca2+ and PO-2 in bones and teeth
Term
parathyroid hormne
Definition
release of Ca2+ and PO-2 from bones and teeth
Term
pH
Definition

scale from 0-14

based on relative amt of H+ and OH- present

pH <7=acidic fluid; H>OH-

pH>7=basic fluid; OH->H+

pH=7=neutral fluid; H+=OH-

Term
mechanisms of pH regulation
Definition
  • buffer systems
    • protein buffer
    • hemoglobin/oxyhemoglobin buffer
  • respiration
  • tubular secretion 
Term
buffer system
Definition
convert strong acids or bases to waek ones
Term
protein buffer
Definition
  • if decrease pH-excess Hpicked up by amine (NH2) group
  • if increase pH-carboxyl group (COOH) releases H+
Term
hemoglobin/oxyhemoglobin buffer
Definition
  • COin blood from carbonic acid (H2CO2) which releases H+
  • ? pH-decreases
  • hemoglobin releases Obecomes negatively charged (Hb) & binds w/ free H(HbH)
  • ? pH- increases
Term
respiration
Definition
  • regulate amt of carbonic acid in blood
    • decreses pH leads to
      • increases respiration rate 
      • elinates CO2 &thus, carbonic acid from blood
    • increases pH leads to
      • decreases respiration rate
      • allows build up of CO2 & thus, carbonic acid in blood
Term
tubular secretion
Definition
  • kidneys
    • decrease pH leads to
      • increase tubular secretion of Hinto urine 
      • less Hin blood raises pH
    • increase pH leads to 
      • decrease tubular secretion of Hinto urine
      • more Hin blood lowers pH
Term
acidosis
Definition

pH imbalance

  • sustained decrease in pH
    • depresses activity of nervous system
    • causes:
      • respiratory-due to
        • hyperventilation
      • metabolic-due to:
        • sustained increased in metabolic rate
        • kidney failure

 

Term
alkalosis
Definition

pH imbalance

  • sustained increase in pH
    • hyperstimulation of nervous syst.
    • causes:
      • respiratory-due to
        • hyperventilation
      • metabolic-due to
        • vomiting (loss of acidic gastric juice)
Term
compensation
Definition

attempt to correct pH imbalance 

  • kidneys (via tubular scretion) can compensate for respiratory - based imbalances 
  • respiration can compensate for metabolic based imbalances 
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