How vitamin B6 is digested, absorbed and stored
Homework Answers
Vitamin B6 :Pyridoxine
Vitamin B6 is a group of 3 compounds Pyridoxine,pyridoxal,pyridoxamine. It is a water soluble vitamin. It is present in many fruits and vegetables but the naturally occurring form of B6 has reduced bioavailability. It is a co- enzyme for many reaction mainly protein and amino acid metabolism. Involved in transamination,decarboxylation,deamination,transsulfuration. Synthesis of niacin coenzyme NAD+ and NADP+ from tryptophan require PLP ( co enzyme )
Digestion : digestion of vitamin B6 involves splitting the vitamin,as it is bound to the protein portion of the food.
Absorption: absorption of pyridoxal phosphate and pyridoxamine phosphate requires their dephosphorylation catalyze by alkaline phosphatase. Absorption occurs in proximal jejunum and ileum of small intestine, through passive diffusion.
Transportation: circulated in blood bound to albumin . This protect it from hydrolysis.
Storage: not stored directly instead stored in the form of its coenzyme PLP Pyridoxal phosphate, mainly in liver,brain,kidney and muscle.
Excretion:excreted as 4-pyridoxic acid through urine.
Daily requirement: Adult 1.3 - 1.7mg, child 0.3 -1.0mg
Why is the requirement for Vitamin B6 different for each person, according to gender and age?
Why is the requirement for Vitamin B6 different for each person, according to gender and age?
Caffeine is uncharged over a wide pH range. In contrast, pyridoxine hydrochloride (vitamin B6) has two...
Caffeine is uncharged over a wide pH range. In contrast, pyridoxine hydrochloride (vitamin B6) has two acid-base active sites: the phenol (pKa = 9.0) and the protonated nitrogen (pKa = 5.0). a. Given this information, write the chemical formula of the most prevalent forms of vitamin B6 (pyridoxine) above each pH region below. pH < 5: 5 < pH < 9: pH > 9:
Please match the water-soluble vitamin (vitamin C, thiamin, riboflavin, niacin, B12, B6, folate) with its main...
Please match the water-soluble vitamin (vitamin C, thiamin, riboflavin, niacin, B12, B6, folate) with its main function. a) DNA, RNA, cell division b) antioxidant, collagen synthesis, redox c) coenzyme specifically with tryptophan metabolism, hemoglobin d) DNA, RNA, methionine metabolism e) coenzyme
When food is digested and absorbed from the GI tract, the lipids are initially found in...
When food is digested and absorbed from the GI tract, the lipids are initially found in which of the following? a) Low density lipoprotein b) Chylomicrons c) High density lipoprotein d) Very low density lipoprotein
Vitamin D 43. Name the primary food sources for each vitamin Vitamin A Vitamin K Vitamin...
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Part A The majority of fat in your diet is digested and absorbed in your small intestine with the help of O bile ac...
Part A The majority of fat in your diet is digested and absorbed in your small intestine with the help of O bile acids and pancreatic lipase O LDL cholesterol. O HDL cholesterol. lingual lipase and bile acids. Submit Request Answer
PRINTER VERSION « BACK Question 6 Pyridoxamine, aka vitamin B6, has the following structure. Which nitrogen...
PRINTER VERSION « BACK Question 6 Pyridoxamine, aka vitamin B6, has the following structure. Which nitrogen is more basic? Explain your choice. 1 CH_NH2 CH2OH HO H3C N 15 basic as it is The nonbonding electrons are hybridized and is easily available in electronegative because of than s character than the hybridized Question Attempts of 1 used SAVE FOR LATER SUBMIT ANSWER
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Which statement about energy metabolism is correct? a. Glycogen stored in the pancreas provides a reserve supply of glucose. b. Vitamins stored in the gallbladder are released as needed. c. During an extended fast, fat reserves stored in fat cells provide energy for cellular processes. d. Liver cells hold reserves of calcium and sodium that can be drawn on to keep blood levels constant. e. Amino acids stored in the kidneys can supply protein needs on a long-term basis. Which...
Sources Role/Function Vitamin Vitamin A Deficiency Name (if applicable) Name of Severe Deficiency Kerophtharia Maintenance of...
Sources Role/Function Vitamin Vitamin A Deficiency Name (if applicable) Name of Severe Deficiency Kerophtharia Maintenance of a Vitamin C Vitamin D Required for the production and maintenance of Collagen Vitamin D acts as a hormone to regulate calcium. it works in three locations Word Bank Each word will only be used once Healthy cornea Milk Vitamin E Most people get the majority of their vitamin E from Vitamin K Our make approximately one-half of our body's requirements Name of Deficiency...
How are vitamins A, D, E, and K absorbed by the body? View Available Hint(s) How...
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When food is digested and absorbed from the GI tract, the lipids are initially found in which of the following? a) Low density lipoprotein b) Chylomicrons c) High density lipoprotein d) Very low density lipoprotein
Vitamin D 43. Name the primary food sources for each vitamin Vitamin A Vitamin K Vitamin E Vitamin B12 Vitamin B3 Vitamin B9 Vitamin B6 Vitamin B1 Vitamin B2
Part A The majority of fat in your diet is digested and absorbed in your small intestine with the help of O bile acids and pancreatic lipase O LDL cholesterol. O HDL cholesterol. lingual lipase and bile acids. Submit Request Answer
PRINTER VERSION « BACK Question 6 Pyridoxamine, aka vitamin B6, has the following structure. Which nitrogen is more basic? Explain your choice. 1 CH_NH2 CH2OH HO H3C N 15 basic as it is The nonbonding electrons are hybridized and is easily available in electronegative because of than s character than the hybridized Question Attempts of 1 used SAVE FOR LATER SUBMIT ANSWER
Sources Role/Function Vitamin Vitamin A Deficiency Name (if applicable) Name of Severe Deficiency Kerophtharia Maintenance of a Vitamin C Vitamin D Required for the production and maintenance of Collagen Vitamin D acts as a hormone to regulate calcium. it works in three locations Word Bank Each word will only be used once Healthy cornea Milk Vitamin E Most people get the majority of their vitamin E from Vitamin K Our make approximately one-half of our body's requirements Name of Deficiency...
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