Chapter 7-
When blood calcium levels are low, which of the following will NOT occur?
Parathyroid hormone increases calcium release from bone.
Which of the following is NOT a function of vitamins?
They are critical structural components of cells.
We consume significant amounts of what vitamin in its most inactive form?
Vitamin A
What vitamin is the MOST toxic when consumed in excess?
Vitamin A
What fat-soluble vitamin can be synthesized by our body's cells?
Vitamin D
Which is NOT true regarding vitamin E's role as an antioxidant?
Vitamin E does not protect white blood cells from oxidative damage.
A deficiency of what vitamin is NOT expected to affect immune function in any way?
Vitamin K
What vitamin has no established UL?
Vitamin K
Which statement is NOT true regarding vitamin A's role in vision?
When light strikes rhodopsin, retinal changes its shape from trans to cis.
Inactive forms of vitamins that are activated once in the body are called:
provitamins
Which of the following is an active form of vitamin A?
retinoic acid
Which of the following would be LEAST likely to affect the bioavailability of a nutrient in a food?
the type of material (ceramic, plastic, metal, etc.) the food is served on
What choice correctly matches the vitamin with one of its primary functions?
vitamin A—cell development
What choice correctly matches the vitamin with its best dietary sources?
vitamin D—fortified foods and fish
What fat-soluble vitamin performs NO regulatory function?
vitamin E
What vitamin plays a key role in both blood clotting and bone formation?
vitamin K
What choice INCORRECTLY pairs the signs and symptoms of deficiency with the correct vitamin?
vitamin K—increased risk of cancer
What two vitamins function as hormones?
vitamins A and D
Which of the following is NOT true regarding the absorption of fat-soluble vitamins?
A low-fat meal has no effect on fat-soluble vitamin absorption.
Which statement about free radicals is NOT true?
Free radicals generated by energy metabolism are not useful to the body.
