- It is important in the buffering system
 that is activated by the exchange of oxy-
 gen and carbon dioxide between body
 tissues and red blood cells.
- It is found primarily within cells and is
 associated with intracellular protein.
- It is essential for acid–base balance and,
 in combination with carbonic acid,
 constitutes the body’s primary buffer
 system.
- It participates in many important chemi-
 cal reactions in the body; for example, it
 is necessary for many B vitamins to be
 effective and plays a role in carbohydrate
 metabolism.
- It is essential for the production of
 hydrochloric acid in gastric cells.
 Match the equations in Part B with the type of
 imbalance listed in Part A.
 PART A
 a.Respiratory acidosis
 b.Metabolic acidosis
 c.Respiratory alkalosis
 d.Metabolic alkalosis
 PART B
- Low pH, normal PaCO 2 , low HCO 3
- Low pH, high PaCO 2 , normal HCO 3
- High pH, normal PaCO 2 , high HCO 3
- High pH, low PaCO 2 , normal HCO 3
 Match the term in Part A with its definition
 listed in Part B.
 PART A
 a.Ion
 b.Electrolyte
 c.Cation
 d.Anion
 e.Solvents
 f.Solutes
 g.Osmolarity
 h.Filtration
 i.Oncotic pressure
 j.Hydrostatic pressure
 k.Diffusion
 l.Active transport
m.Filtration pressure
n.Buffer
o.Intravascular fluid
p.Interstitial fluid
PART B- Ions that develop a positive charge
- Substances that are dissolved in a
 solution
- Fluid that surrounds tissue cells, includ-
 ing lymph
- Measured in terms of their chemical
 combining power, or chemical activity
- The liquid constituent of blood
- A process that requires energy for the
 movement of substances through a
 cell membrane from an area of lesser
 concentration to an area of higher
 concentration
- The passage of a fluid through a
 permeable membrane
- An atom or molecule carrying an
 electric charge
- An ion with a negative charge
- Liquids that hold a substance in solution
- A force exerted by a fluid against the
 container wall
- The difference between colloid osmotic
 pressure and blood hydrostatic pressure
- A substance that prevents body fluids
 from becoming overly acidic or alkaline
- The concentration of particles in a solu-
 tion, or its pulling power
- The tendency of solutes to move freely
 throughout a solvent
CORRECT THE FALSE STATEMENTS
Circle the word “true” or “false” that follows
the statement. If you circled “false,” change the
underlined word or words to make the statement
true. Place your answer in the space provided.
1.The human body is composed of 50% to 60%
water by weight.
True False278 UNIT VII PROMOTING HEALTHY PHYSIOLOGIC RESPONSES
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