Exam - Vitamin B6

Question 1

supplement label

Answer 1

converts carbs, proteins, fats to energy

Question 2

what does vitamin B6 exist as

Answer 2

6 vitamers that are interchangeable and comparably active

Question 3

what are the 6 vitamers

Answer 3

phosphorylated and unphosphorylated pyridoxine, pyridoxal, pyridoxamine

Question 4

which vitamers are the plant provitamins

Answer 4

pyridoxine

Question 5

where are all isomers found

Answer 5

foodd

Question 6

what occurs to B6 prior to absorption

Answer 6

dephosphorylated

Question 7

how is B6 absorbed

Answer 7

passive diffusion in jejunum

Question 8

what is the main form of B6 found in blood, bound to albumin

Answer 8

PLP

Question 9

where are high levels of B6 found

Answer 9

muscle

Question 10

where do B6 conversions primarily occur

Answer 10

liver

Question 11

what is PLP

Answer 11

cofactor for many enzymes including amiotransferases

Question 12

what is B6 involved in the first step of

Answer 12

pophryin (heme) synthesis

Question 13

what does B6 take part in

Answer 13

synthesis of neuroactive amines

Question 14

what does vitamin B6 deficiency cause

Answer 14

microcytic anemia

Question 15

what does PLP =

Answer 15

co-enzyme

Question 16

what are stem cells in bone marrow differentiated in the presence of

Answer 16

erythropoietin (EPO)

Question 17

what does differentiation normally cause red blood cells to do

Answer 17

shrink, nucleus is removed, able to carry O2

Question 18

what is the differentiation process for red blood cells very sensitive to

Answer 18

micronutrient deficiencies - leads to anemia

Question 19

3 types of anemia

Answer 19

1. megaloblastic anaemia
2. hemolytic anameia
3. microcytic anaemia

Question 20

what is the result of megaloblastic anemia

Answer 20

bigger cells get produced