BIOS 256 EXAM 3 Questions with Verified
Correct Answers
What is the most abundant component of body fluid?
Water
What percentage of body fluid is water?
45%-60%
What percentage of water are newborns?
75%
What are the major fluid components of the body?
Intracellular (ICF) and Extracellular (ECF)
What percentage of fluid is ICF?
65%
What percentage of fluid is ECF?
35%
What components make up the ECF?
25% interstitial fluid, 8% blood plasma and lymph, and 2% transcellular fluid
Intracellular fluid
found inside the cells and makes up the majority of all body fluids
, Extracellular fluid
found outside of the cells and can be divided into interstitial fluid (80%) and blood plasma (20%)
What are the general function of electrolytes?
Controls osmosis of water, regulate bodily secretions, maintains acid-base balance, carries the
electric currents for graded and action potentials, and serves as cofactors for enzymatic activities
What is natriuresis?
Increased excretion of sodium by the kidneys, caused by natriuretic peptides, which inhibits
sodium and water reabsorption, therefor the kidneys secrete more sodium and water which
lowers the blood pressure
What hormone promotes natriuresis?
ANP
If sodium is high outside the cell what happens to potassium?
Potassium is high in the cell, they are always opposite.
What is the most abundant cation in the ECF?
Sodium
What is the most abundant anion in the ECF?
Chloride
What is the most abundant cation in the ICF?
Potassium
Correct Answers
What is the most abundant component of body fluid?
Water
What percentage of body fluid is water?
45%-60%
What percentage of water are newborns?
75%
What are the major fluid components of the body?
Intracellular (ICF) and Extracellular (ECF)
What percentage of fluid is ICF?
65%
What percentage of fluid is ECF?
35%
What components make up the ECF?
25% interstitial fluid, 8% blood plasma and lymph, and 2% transcellular fluid
Intracellular fluid
found inside the cells and makes up the majority of all body fluids
, Extracellular fluid
found outside of the cells and can be divided into interstitial fluid (80%) and blood plasma (20%)
What are the general function of electrolytes?
Controls osmosis of water, regulate bodily secretions, maintains acid-base balance, carries the
electric currents for graded and action potentials, and serves as cofactors for enzymatic activities
What is natriuresis?
Increased excretion of sodium by the kidneys, caused by natriuretic peptides, which inhibits
sodium and water reabsorption, therefor the kidneys secrete more sodium and water which
lowers the blood pressure
What hormone promotes natriuresis?
ANP
If sodium is high outside the cell what happens to potassium?
Potassium is high in the cell, they are always opposite.
What is the most abundant cation in the ECF?
Sodium
What is the most abundant anion in the ECF?
Chloride
What is the most abundant cation in the ICF?
Potassium
