BIOL 235 Chapter 27 Exam Questions
and Answers 100% Pass
body fluids - ✔✔The water and dissolved solutes throughout the body
-55-60% total mass
-present in 2 main "compartments"
2 main body fluid compartments - ✔✔intracellular fluid
extracellular fluid
intracellular fluid (ICF) - ✔✔fluid within cells
-2/3
extracelular fluid (ECF) - ✔✔outside cells and all other fluids
-1/3
Types of extracellular fluid - ✔✔plasma and interstitial fluid
1
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,interstitial fluid - ✔✔occupies microscopic spaces between tissue cells
-80% ECF
plasma - ✔✔liquid portion of blood
-20% ECF
2 general barriers that separate ICF, interstitial fluid and plasma -
✔✔plasma membrane
blood vessel walls
plasma membrane - ✔✔*selectively permeable*: allows some substances to
cross, blocks movement of other substances
-separates INTRACELLULAR Fluid from INTERSTITIAL fluid
blood vessel walls - ✔✔divide INTERSTITIAL fluid from BLOOD
PLASMA
fluid balance - ✔✔required amounts of water and solutes are present and
are correctly proportioned among the various compartments in the body
-water: largest component~45-75% mass
2
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, -most solutes= electrolytes
*fluid balance is related to electrolyte balance*
electrolytes - ✔✔inorganic compounds that dissociate into ions
sources of body water gain - ✔✔-ingestion
-metabolic synthesis
metabolic water - ✔✔Produced when electrons are accepted by oxygen
during cellular respiration
sources of body water loss - ✔✔-kidney excretion (urine)
-skin evaporation
-lung exhalation
-GI tract eliminates (feces)
body fluids constant - ✔✔water loss=water gain
regulation of body water gain - ✔✔-fluid drinking
thirst center - ✔✔Hypothalamus
3
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and Answers 100% Pass
body fluids - ✔✔The water and dissolved solutes throughout the body
-55-60% total mass
-present in 2 main "compartments"
2 main body fluid compartments - ✔✔intracellular fluid
extracellular fluid
intracellular fluid (ICF) - ✔✔fluid within cells
-2/3
extracelular fluid (ECF) - ✔✔outside cells and all other fluids
-1/3
Types of extracellular fluid - ✔✔plasma and interstitial fluid
1
100% Pass Guarantee Katelyn Whitman, All Rights
,interstitial fluid - ✔✔occupies microscopic spaces between tissue cells
-80% ECF
plasma - ✔✔liquid portion of blood
-20% ECF
2 general barriers that separate ICF, interstitial fluid and plasma -
✔✔plasma membrane
blood vessel walls
plasma membrane - ✔✔*selectively permeable*: allows some substances to
cross, blocks movement of other substances
-separates INTRACELLULAR Fluid from INTERSTITIAL fluid
blood vessel walls - ✔✔divide INTERSTITIAL fluid from BLOOD
PLASMA
fluid balance - ✔✔required amounts of water and solutes are present and
are correctly proportioned among the various compartments in the body
-water: largest component~45-75% mass
2
100% Pass Guarantee Katelyn Whitman, All Rights
, -most solutes= electrolytes
*fluid balance is related to electrolyte balance*
electrolytes - ✔✔inorganic compounds that dissociate into ions
sources of body water gain - ✔✔-ingestion
-metabolic synthesis
metabolic water - ✔✔Produced when electrons are accepted by oxygen
during cellular respiration
sources of body water loss - ✔✔-kidney excretion (urine)
-skin evaporation
-lung exhalation
-GI tract eliminates (feces)
body fluids constant - ✔✔water loss=water gain
regulation of body water gain - ✔✔-fluid drinking
thirst center - ✔✔Hypothalamus
3
100% Pass Guarantee Katelyn Whitman, All Rights
