This is regarding a current grade that I have received for an exam taken in Nutrition, Diet and Health. The particular one I am referring to is exam 10 in Nutrition, Diet and Health part 2 (VMV02).
I missed two questions and I am confused as to why those were missed.
Question 25 states:
"Absorption of minerals can be limited by each of the following factors except"
A. physiological need.
B. presence of competing minerals.
C. presence of hypertension or osteoporosis.
D. presence of fiber.
I answered "C" due to what the textbook says, on page 394 and 395:
"In many cases, the body adjusts mineral absorption to our needs." (Which would rule out A. physiological need.)
"Megadosing with single-mineral supplements can hamper the absorption of other minerals. Minerals such as calcium, iron, zinc, and magnesium, for example, all have similar chemical properties and compete for absorption." (Which would rule out B. presence of competing minerals.)
"Fiber and other components of food also affect mineral bioavailibility. High-fiber diets reduce absorption of iron, calcium, zinc, and magnesium. (Ruling out D. presence of fiber.)
There is also a drawing on page 395 that lists the factors that affect the absorption of minerals and among the many are: "fiber", "person's needs", and "other minerals competing for absorption". There is no hypertension or osteoporosis listed. The "hypertension" and "osteoporosis" sections (pages 395 and 396) do not say anything about inhibiting the absorption of minerals.
Also:
Question 27 states:
"Americans are most likely to not get enough of which one of the following minerals?"
A. Calcium
B. Boron
C. Magnesium
D. Sodium
I answered "C" due to what the textbook says:
(Page 407) "The average American gets only about three-fourths this level." (Referring to the level of magnesium.) Indicating that it is unlikely that Americans don't get enough magnesium.
The section about Boron indicates that adequate amounts are ingested.
The section about Sodium indicates that there is WAY TOO MUCH sodium in American diets.
The section on Calcium (page 403) DOES state that: "Unfortunately, many of us fall short of recommended calcium intakes."
So I am confused as to how I could be considered to have answered incorrectly in this case. Both Magnesium and Calcium are correct answers, due to the textbook identifying both minerals as being a deficiency in regular diet. The reason I chose Magnesium is because the textbook was specific to say "Americans" were not getting enough, whereas it wasn't specific like that with Calcium. But, I feel the even bigger confusion here is the fact that the textbook stated that both Magnesium AND Calcium were minerals that weren't taken enough of.
I would really like some clarification on these two issues and greatly appreciate any time taken to figure this out and answered back. If I can provide any further information please let me know!
Thank you!!!
Lynsey Young
VM1400138