This topic contains a solution. Click here to go to the answer

Author Question: Vitamin A may be obtained by the body from precursors called a. calciferols. b. carotenoids. c. ... (Read 67 times)

RRMR

  • Hero Member
  • *****
  • Posts: 557
Vitamin A may be obtained by the body from precursors called
 
  a. calciferols.
  b. carotenoids.
  c. rhodopsins.
  d. tocopherols.

Question 2

Vegetables are likely to be highest in vitamin C if they are
 
  a. boiled.
  b. canned.
  c. stir-fried.
  d. oven roasted.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

raenoj

  • Sr. Member
  • ****
  • Posts: 340
Answer to Question 1

B
The body can form vitamin A from carotenoids. Calciferols have vitamin D activity. Tocopherols have vitamin E activity. Rhodopsin is a substance formed from vitamin A in the retina.

Answer to Question 2

C
Vegetables are likely to be highest in vitamin C if they are stir-fried. Heat destroys vitamin C, so cooking for the minimum amount of time preserves vitamin C. Vitamin C is water-soluble, so cooking methods that use water cause loss of vitamin C into the cooking liquid. Stir-frying cooks vegetables quickly without adding water. Boiling and canning both cause loss of vitamin C be-cause of use of water. Oven roasting is a slow cooking method so more vitamin C is lost.





 

Did you know?

Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

Did you know?

Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

Did you know?

Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.

For a complete list of videos, visit our video library