Deck 8: Phytochemicals

Question 1

Some free radicals are unavoidable by-products of normal metabolism.

Answer 1

True

Question 2

The prefix "phyto" means:

A)light.
B)plant.
C)fiber.
D)photon.

Answer 2

B

Question 3

A key reason why an RDA for phytochemicals has been difficult to establish is due to:

A)their synergystic effect.
B)their naturally-occuring genesis.
C)their variety of forms.
D)their broad functions.

Answer 3

A

Question 4

Carotinoids are probably the most studied class of phytochemicals.

Question 5

Antioxidants have the capacity to neutralize:

A)DNA.
B)lipids.
C)free radicals.
D)water.

Question 6

Conditions that typically occur later in life as the result of lifelong accumulated risk are called:

A)low-risk diseases.
B)cancer.
C)secondary diseases.
D)diseases of aging.

Question 7

Phytochemicals are regarded as nutrients.

Question 8

Resveratrol,which is present in wine and grapes and thought to have protective effects against cancer,is a member of the phytochemical group called:

A)flavinoids.
B)phenolics.
C)phytoestrogens.
D)carotinoids.

Question 9

Phytochemicals have greater benefits if consumed at higher doses,in supplement form.

Question 10

In addition to their antioxidant properties,phytochemicals are also believed to:

A)reduce inflammation that can lead to potentially serious disease.
B)aid in childbirth.
C)assist with sleep.
D)retard hair thinning as a result of age or chemical exposure.

Question 11

Oxidative damage has been linked to the aging process.

Question 12

Phytochemicals are synthetic substances.

Question 13

Over 10,000 different phytochemicals have been identified.

Question 14

Which of the following is the BEST expression of the synergistic action of phytochemicals?

A)Each phytochemical has an independent function.
B)Phytochemicals oppose the action of certain vitamins.
C)Phytochemicals interact with each other and with other substances to provide a greater summative effect.
D)Phytochemicals can neutralize free radicals.

Question 15

Naturally occurring compounds found in plants and believed to have health-promoting properties are called:

A)steroids.
B)antioxidants.
C)phytochemicals.
D)chlorofluorocarbons.

Question 16

Phytochemicals have established daily recommended intakes.

Question 17

Which type of studies are most commonly used as evidence for the benefits of phytochemicals?

A)epidemiological
B)experimental
C)survey
D)retrospective

Question 18

Scientists now believe that phytochemicals may benefit health by stressing our cells.

Question 19

Free radicals are only produced in response to radiation,pollution,industrial chemicals,tobacco smoke,or infections.

Question 20

Phytochemicals may be ineffective or even harmful when:

A)heated
B)diluted.
C)consumed as supplements.
D)consumed in raw foods.

Question 21

A basic principle of toxicology states that doseage is not an important factor.

Question 22

Experts recommend beta-carotene supplementation to help with chronic disease prevention or treatment.