immuno 1 Flashcards
what percent of total body weight is blood
8
what are the components that make up blood and what are they suspended in
plasma
erythrocytes
leukocytes
thrombocytes
erythrocytes
red blood cells- whole cells
99%
leukocytes
white blood cells- whole cells
throbocytes
platelets- cell fragments
dispersion of cells in plasma
generally evenly dispersed in plasma
what do hematocrit levels represent
the percentage of rbc in total volume
average hematocrit levels in women and men
42% women
45% men
plasma makes up the remaining volume
what makes up 90% of plasma
water
what does plasma serve as
the medium to carry the components within the blood
has high capacity to hold heat and helps distribute heat throughout the body
what does plasma consist of other than water
several inorganic substances including electrolytes (ions) such as Na Cl K Ca H2CO3———–function as regulators of membrane excitability, osmotic distribution between extracellular fluid and cells and pH buffering
organic substances such as plasma proteins, glucose, AA, lipids, vitamins, creatine, bilirubin, hormones, and gases
what is serum
the part of blood which is similar in composition to plasma but lacks the clotting factors
it is the liquid part of blood after clotting is allwoed to occur
what do blood tests require
some require serium while others require plasma
where are plasma protiens synthesized
most in the liver
exception- gamma globulins aka antibodies
what do plasma proteins do
establish osmotic gradient bw blood and interstitial fluid (colloid osmotic pressure) and prevents excessive losss of plasma from capillaries intot he interstitial fluid and maintains plasma volume
helps in maintaining the plasmas capacity to buffer changes in pH
what are the 3 groups of plasma protiens
albumins
globulins
fibinogen
