Plasma

 

1. Reference
   • http://www.jonbarron.org/heart-health-program/08-27-2007.php
2. Describe role of cell in blood
   • the blood plasma helps to know which higher molecular weight settle at the bottom rbc while the lighter plasma rises to the top.
3. Structural features
   • cells suspended in plasma (see other presentations)
   • 90% water
     • water is less dense than erythrocyte or leukocyte
   • electrolytes (inorganic, molecules or atoms that do not contain carbon,  salts
     • Na+ or K+ or Cl-
   • buffers (molecules)
   • proteins (like enzymes, albumin etc.)
4. Relate structural features to functions
   • Water molecule is polar
     • polar "sticks" to ions, therefore ions dissolve well in water
     • polar molecules form H-bonds, therefore dissolve CHO and proteins
   • Electrolytes (sodium and chloride)
     • with maintain osmotic balance of the blood by controlling movement of the water
       • diffusion
       • osmosis
     • Ions controlled nerve impulses and mucscle movement.
   • Buffer controls the ph of the blood in human body (at about pH = 7.4)
     • give up H+ (if it is basic ~ 7-14) and they take H+ (if it is too acidic ~ 1-7)
   • proteins
     • keep water concentration balances present in blood
     • some are chemical signals (to help blood clot)