Question 1

Which of the following plant sources of calcium has the lowest bioavailability?

Accepted Answer

Spinach contains oxalates, which can bind with calcium and reduce its absorption in the body, resulting in lower bioavailability compared to other plant sources of calcium. However, it is still a good source of calcium and can be included in a balanced diet.

Question 2

People who live in the northernmost parts of the United States cannot get adequate sun exposure to synthesize vitamin D between the months of October and February.

Accepted Answer

This is true because during the winter months in northern parts of the United States, the angle of the sun is too low, and there are not enough UVB rays to synthesize vitamin D in the skin.

Question 3

Discuss the factors that influence the bioavailability of calcium in the body.

Accepted Answer

The answer of Discuss the factors that influence the bioavailability...

Question 4

There are very few natural food sources of vitamin D.

Accepted Answer

Most of the vitamin D that people need comes from exposure to sunlight, not from their diet. Few foods naturally contain significant amounts of vitamin D; notable exceptions include fatty fish, fish liver oils, and egg yolks.

Question 5

Which of the following practices would NOT decrease the risk of developing a vitamin D deficiency?

Accepted Answer

The answer of Which of the following practices would NOT...

Question 6

The bioavailability of calcium from spinach is limited because of the leafy green's

Accepted Answer

Spinach contains a high level of oxalates, which can bind to calcium and form oxalate crystals, making it less available for absorption by the body.

Question 7

Discuss various ways that you can receive your normal daily dose of vitamin D from the sun.

Accepted Answer

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Question 8

Alexa is concerned that she is not consuming enough calcium. She does not drink any cow's milk, and the only dairy product she likes is yogurt. Discuss several ways that Alexa could increase her daily intake of calcium.

Accepted Answer

The answer of Alexa is concerned that she is not...

Question 9

Describe the process by which the body converts sunlight to active vitamin D in the body. Discuss the hormones and the organs involved in this process.

Accepted Answer

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Question 10

Which of the following is NOT a proposed factor associated with the increase in vitamin D deficiency among Americans?

Accepted Answer

The other three options have been proposed as factors contributing to the increase in vitamin D deficiency among Americans, but there is no evidence to suggest that increased consumption of soft drinks is a factor. In fact, some soft drinks are now fortified with vitamin D.

Question 11

How does bone serve as a "calcium bank" for the body?

Accepted Answer

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Question 12

Soft drink consumption is associated with poor bone health. Describe the proposed theories that explain this relationship.

Accepted Answer

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Question 13

The current AI for vitamin D meets the health needs of a majority of Americans.

Accepted Answer

According to the National Institutes of Health, an estimated 40% of Americans are deficient in vitamin D. Therefore, the current AI (adequate intake) for vitamin D may not be sufficient for meeting the health needs of a majority of Americans.

Quiz 9: Nutrients Involved in Bone Health