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 69 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?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

Did you know?

The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

Did you know?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

Did you know?

One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.

For a complete list of videos, visit our video library