SciFom Water

The flashcards below were created by user jdespain on FreezingBlue Flashcards.

  1. How many liters of water in blood, Interstitial Fluid and intracellular fluid? How much water total in the body?
    3, 11, 28, total 43
  2. Water accounts for what percent of total body weight?
  3. Why is water considered the solvent of life?
    dissipation of heat, separates charged molecules, transport medium, chemical reactions.
  4. Symptoms of dehydration
    Cell shrinkage, hypotension, electrolyte disturbance, temp dysregulation, death
  5. Symptoms of overhydration
    Cell swelling, hypertension, edema, death
  6. What causes waters unique thermal properties?
    structure, H-bonding requires large amounts of heat to break or change.
  7. High thermal conductivity and heat of vaporization allow the body to...
    dissipate heat into the blood from metabolic sites and cool the skin
  8. What is a hydration shell?
    Water pulls apart ionic compounds and surrounds them as solvent, orientation of water is depended on ionic charge.
  9. Are H-bonds static?
    No, they associate and dissociate constantly, this allows for movement of solutes.
  10. What is the total osmolarity of the body?
    280 mOsm/L
  11. Why is the osmolarity of the plasma more than that for the interstitial fluid for protein?
    capillary pores are too small to allow protein to freely move into the interstitial fluid.
  12. Osmosis is defined as
    movement of water from low to high osmolarity (low conc. to high conc.)
  13. Define osmotic pressure
    the amount of pressure needed to STOP osmosis, determined by the number of particles, NOT mass. This is sort of like voltage or potential.
  14. 1 milliosmole per liter =
    19.3 mmHg osmotic pressure
  15. define iso, hypo and hypertonic solution
    solution where there is no net movement - movement into the cell - movement out of the cell
  16. What is the primary ion used to control osomoarity?
  17. You drink WAY too much saline because you were bored. What is the effect on your EFC and ICF volume and osmolarity?
    Only volume increases of the ECF.
  18. For a class you drink 2 liters of hyposaline solution. What happens to the volume and osmolarity of your ECF and ICF?
    the osmolarity of both will decrease, and volume of the ECF  and ICF will increase. Water will move from the ECF to the ICF.
  19. Your professor promieses an A in the class if you drink a 2L of hypersaline solution. So you do. What happens?
    Your total volume increases in ECF. Water moves from the ICF to the ECF, and the total osmolarity will increase
  20. When fluid loss = salt loss, what happens?
    None really. total fluid loss, no change in osmolarity or electrolytes.
  21. When fluid loss >> salt loss, what happens?
    increased osmolarity, decreased ICF, increased ECF, excess sweating, ADH defficency. fluid loss >> salt loss
  22. What is ADH?
    Aldosterone, a salt retaining hormone
  23. When fluid loss << salt loss, what happens?
    ECF decreases, ICF increases, osmol decreases. aldosterone deficiency
  24. When fluid gain >> salt gain, what happens?
    increase ECF, increase ICF, increase osmols. Excess ADH
  25. When fluid gain << salt gain, what happens?
    increase in osmols, decrease ICF increase ECF
  26. How do you calculate pH?
    pH = -log[H+]
  27. What is the Henderson-Hasselbalch equation?
    pH = pka + log ([A-]/[HA])
  28. What is pKa?
    The pH when a solution is made 1/2 weak acid and 1/2 its conjugate base.
  29. When a pH solution < pKa...
    equilibrium favors the protonated state of the weak acid, there is less conjugate base.
  30. what is pKa in relation to buffer systems?
    Determines the capacity of a buffer to resist changes in pH.
  31. Carboxylic acids are usually ______ at physiological pH, while amines are usually ______.
    deprotontated , protonated
  32. Basic amino acids
    Lysine (Lys,K), arginine (A(r)g)
  33. Acidic amino acids
    Aspartate (Asp, D), glutamate (Glu, E)
  34. Normal ECF pH?
  35. Draw the Bicarbonate buffer system
    CO2 + H2O <--(carbonic anhydrase)--> H2CO3 <--> HCO3- + H+
  36. Normal concentration of HCO3- in the blood?
    24mM, 1.2mM
  37. What organ regulates the amount of CO2 in the blood? HCO3-?
    Lungs, Kidneys
  38. Give the values for light and severe alkalosis.
    Give the values for slight and severe acidosis.
    • 7.5, 7.7
    • 7.3, 7.0
Card Set:
SciFom Water
2016-08-19 04:15:11
SciFom Exam 1
Show Answers: