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NTR 301 Test #4 Questions and Answers
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NTR 301 Test #4 Questions and Answers Water - Ans:-Most abundant nutrient in the body 60%; 50% - Ans:-Men are ~_____ water by weight; women are ~_____ water by weight They have more muscle - Ans:-Why do men contain more water than women in their bodies? 1. Provides structure: makes up cytoplasm...

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  • October 23, 2024
  • 24
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • ntr 301 test 4 questions and answers

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©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




NTR 301 Test #4 Questions and Answers


Water - Ans:✔✔-Most abundant nutrient in the body


60%; 50% - Ans:✔✔-Men are ~_____ water by weight; women are ~_____ water by weight


They have more muscle - Ans:✔✔-Why do men contain more water than women in their bodies?


1. Provides structure: makes up cytoplasm


2. Acts as a solvent: many biochemical reactions can take place only when reacting components are

dissolved in water


3. Acts as a catalyst: hydrolysis - splitting of compounds via water


4. Transports compounds: the medium for oxygen, nutrients, enzymes, immune factors, waste products,

and others via GI secretions, blood, lymph, urine, etc,


5. Acts as a lubricant: tears, saliva, mucus, synovial fluid, amniotic fluid


6. Controls body temp: water holds its temp well - helps prevent wide swings in body temp; water carries

heat away from body via sweat - Ans:✔✔-Functions of water in the body




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, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




Extreme thirst, less frequent urination, dark colored urine, fatigue, dizziness, confusion - Ans:✔✔-

Symptoms of dehydration


Tells you when to start drinking, but quenching your thirst is not a good indicator of complete fluid

replacement, especially for athletes - Ans:✔✔-Thirst as an indicator of hydration level


Sense of thirst decreases with increasing age; diuretic medications are common - Ans:✔✔-Why are older

adults at risk for dehydration?


May lose water rapidly through their skin; infection leading to diarrhea, causing dehydration is a major

cause of infant death worldwide - Ans:✔✔-Why are infants at risk for dehydration?


Feces (~4%), insensible loss: evaporation from skin and breath(~28%), sweat (~8%), urine (~60%) -

Ans:✔✔-Primary routes of water loss


Stays constant - Ans:✔✔-How does the rate of water loss in feces change from normal temp to hotter

temp/prolonged exercise?


Stays constant - Ans:✔✔-How does the rate of water loss from skin change from normal temp to hotter

temp/prolonged exercise?


Increases - Ans:✔✔-How does the rate of water loss from respiration change from normal temp to hotter

temp/prolonged exercise?




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, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




Increases - Ans:✔✔-How does the rate of water loss from sweat change from normal temp to hotter

temp/prolonged exercise?


Decreases - Ans:✔✔-How does the rate of water loss in urine change from normal temp to hotter

temp/prolonged exercise?


1. Cells in brain (osmoreceptors) detect increased extracellular sodium concentration (blood osmolality)


2. Osmoreceptors signal pituitary gland to release antidiuretic hormone (ADH)


3. ADH signals kidneys to conserve water, which dilutes blood plasma


4. Also triggers kidneys to increase production of angiotension II, stimulating thirst. It also stimulates

adrenal glands to release aldosterone


5. Aldosterone signals kidneys to retain sodium, and this sodium goes back into blood - Ans:✔✔-How

does the body conserve water in the face of increasing losses?


~80% of daily intake is from fluids and ~20% is from solid foods - Ans:✔✔-What does the DRI for water

assume?


-Men: 3.7 L or 125 oz; 80% = 100 oz


-Women: 2.7 L or 91 oz; 80% = 70 oz - Ans:✔✔-DRI for water




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