Vitamin D

Question 1

What is the Vitamin D deficiency disease?

Answer 1

-Rickets

Question 2

What is the active form of Vitamin D?

Answer 2

-Calcitriol (1alpha,25 dihydroxycholecalciferol)

Question 3

What is the plant derived form of Vitamin D?

Answer 3

-D2(ergocalciferol)(not active form)

Question 4

What is the form of vitamin D that is synthesized from sunlight and skin and found in animal sources?

Answer 4

-Cholecalciferol or Vitamin D3 (not active form)

Question 5

What is the DRI for Vitamin D ages 1-70 for both male and females?

Answer 5

-600 IU (15mcg)

Question 6

Give examples of food sources of vitamin D?

Answer 6

-salmon, fortified cereal, fortified milk, egg yolk, irradiated mushrooms

Question 7

What is the upper level of Vitamin D?

Answer 7

-4,000 IU
-symptoms include nausea, vomiting, weakness and altered level of consciousness, excessive thirst

Question 8

What are some of the factors that affect the body’s ability to synthesize vitamin D?

Answer 8

-Clothing and sunscreen, higher melanin content, skin temperature, burn patients,obesity and aging

Question 9

Where is Vitamin D stored?

Answer 9

-Liver, adipose tissue, Pre-D3 in skin lipids

Question 10

Where is Vitamin D excreted?

Answer 10

-bile, through feces

Question 11

Bone formation is done by

Answer 11

-osteoblast

Question 12

Bone resorption(breakdown of bone) is done by

Answer 12

-osteoclast

Question 13

Describe what happens in the body when responding to hypercalcemia

Answer 13

-calcitonin levels increase
-osteoblasts build bone using calcium(take calcium from plasma to decrease levels)
-kidney increases calcium excretion
-feedback inhibition of 1 alpha hydroxylase to slow rate of active D formation