IPHY 2420 NUTRITION CU BOULDER
DR. NELSON EXAM 2 WITH CORRECT
SOLUTIONS
What percentage of our body weight is water? - ANSWER-Up to 50-75%
What is water made out of? - ANSWER-Two hydrogen atoms and one oxygen atom
T/F Water is a major solvent? - ANSWER-True
List the functions of water in the body - ANSWER-solvent. major component of blood,
saliva, sweat, tears, mucus, joint fluid. removes wastes. helps transport substances.
lubricates tissues. regulates body temperature. helps digest food. participates in many
chemical reactions. helps maintain proper blood pH.
What makes up your total water intake? - ANSWER-Beverages+Foods+Metabolic
Water
Metabolic Water - ANSWER-Water formed by cells as a metabolic by-product
What is a diuretic? - ANSWER-Substances that increase urine output?
What are two extremely common dietary diuretics? - ANSWER-Caffeine and alcohol
What do diuretics do? - ANSWER-Inhibit ADH, resulting in urinary water losses that are
greater than the amount of fluid actually consumed
What happens when you are dehydrated and lose 1-2% of body fluid? - ANSWER-
Fatigue and thirst
What happens when you are dehydrated and lose 4% of body fluid? - ANSWER-Loss of
muscular strength and endurance
What happens when you are dehydrated and lose 7-10% of body fluid? - ANSWER-
Severe weakeness
What happens when you are dehydrated and lose 20% of body fluid? - ANSWER-Death
Why are older adults more at risk for dehydration? - ANSWER-They do not sense thirst
as quickly as younger people
DR. NELSON EXAM 2 WITH CORRECT
SOLUTIONS
What percentage of our body weight is water? - ANSWER-Up to 50-75%
What is water made out of? - ANSWER-Two hydrogen atoms and one oxygen atom
T/F Water is a major solvent? - ANSWER-True
List the functions of water in the body - ANSWER-solvent. major component of blood,
saliva, sweat, tears, mucus, joint fluid. removes wastes. helps transport substances.
lubricates tissues. regulates body temperature. helps digest food. participates in many
chemical reactions. helps maintain proper blood pH.
What makes up your total water intake? - ANSWER-Beverages+Foods+Metabolic
Water
Metabolic Water - ANSWER-Water formed by cells as a metabolic by-product
What is a diuretic? - ANSWER-Substances that increase urine output?
What are two extremely common dietary diuretics? - ANSWER-Caffeine and alcohol
What do diuretics do? - ANSWER-Inhibit ADH, resulting in urinary water losses that are
greater than the amount of fluid actually consumed
What happens when you are dehydrated and lose 1-2% of body fluid? - ANSWER-
Fatigue and thirst
What happens when you are dehydrated and lose 4% of body fluid? - ANSWER-Loss of
muscular strength and endurance
What happens when you are dehydrated and lose 7-10% of body fluid? - ANSWER-
Severe weakeness
What happens when you are dehydrated and lose 20% of body fluid? - ANSWER-Death
Why are older adults more at risk for dehydration? - ANSWER-They do not sense thirst
as quickly as younger people
