Vitamin D

Question 1

What is the most active form of vitamin D?

Answer 1

Calcitriol

Question 2

Calcitriol is also a ______ ?

Answer 2

Hormone

Question 3

What is the DRI for vitamin D?

Answer 3

600 IU/day

Question 4

What are some food sources of vitamin D?

Answer 4

Fish Liver Oils
Fatty Fish
Eggs
Liver
Butter
Fortified Juices
Milk
Shitake Mushrooms

Question 5

Ergocalciferol is a form of _____ ?

Answer 5

Vitamin D2

Question 6

Cholecalciferol is a form of _____ ?

Answer 6

Vitamin D3

Question 7

Exposure to sunlight converts 7-dehydrocholesterol to _____ ?

Answer 7

Vitamin D

Question 8

Vitamin D is absorbed from _____ with _____ ?

Answer 8

Micelle with Lipids

Question 9

Vitamin D enters circulation via?

Answer 9

Chylomicron

Question 10

In the Liver, cholecalciferol is converted into?

Answer 10

25-OH cholecalciferol

Question 11

In the kidney, 25-OH cholecalciferol is converted via?

Answer 11

Parathyroid Hormone (PTH)

Question 12

Low calcium levels stimulate?

Answer 12

Parathyroid Hormone (PTH)

Question 13

Parathyroid Hormone increases the production of?

Answer 13

Calcitriol

Question 14

Calcitriol stimulates calcium absorption a the ______ ?

Answer 14

Intestine

Question 15

Calbindin stimulates the synthesis of?

Answer 15

Calcium Absorption

Question 16

Low calcium levels stimulate calcitriol through _____ which increases renal calcium ______ ?

Answer 16

PTH > Renal Calcium Reabsorption

Question 17

Calcitriol + PTH = ?

Answer 17

Osteoclast Signaling

Question 18

Calcitriol may prevent _____ ?

Answer 18

Cancer Growth

Question 19

Rickets is the symptoms of?

Answer 19

Bowed Legs, Knock-Knees

Question 20

Rickets is the condition of?

Answer 20

Not enough calcium in bone & weight-bearing TUT changes in bone structure

Question 21

Blood Calcium is kept normal at the expense of?

Answer 21

Bones

Question 22

People with fat malabsorption are at risk of?

Answer 22

Vitamin D deficiency

Question 23

Populations at risk of vitamin D deficiency are?

Answer 23

Winter Infants (born/remain inside)
Vegans
Elderly
Renal/Liver Disease
Dark Skin

Question 24

Vitamin D Toxicity can result in _______ calcification.

Answer 24

Soft-Tissue

Question 25

Nausea & Anorexia are also symptoms of?

Answer 25

Vitamin D deficiency

Question 26

What is the upper limit of vitamin D?

Answer 26

4000 IU/day

Question 27

What is the best indicator of recent vitamin D intake or sun exposure?

Answer 27

Plasma 25-OH cholecalciferol

Question 28

What is the optimal level of Plasma 25-OH cholecalciferol?

Answer 28

30-60 ng/mL