Vitamin B12 Absorption & Metabolism | 2 Enzymes That Require Vitamin B12

The video tutorial covers the absorption, metabolism, and importance of vitamin B12, also known as cobalamin. It explains the complex process of how vitamin B12 is absorbed in the body, including the roles of hapta corn and intrinsic factor. The video also discusses the body's mechanisms for retaining and reabsorbing vitamin B12, the enzymes that require it, and the effects of deficiency. Finally, it provides dietary recommendations for different age groups, including special considerations for pregnancy and lactation.

What is a major challenge for vegetarians in obtaining sufficient Vitamin B12?

• Plants do not produce Vitamin B12.

• Vitamin B12 is destroyed during cooking.

• Vitamin B12 is only found in fruits.

• Vitamin B12 is only available in supplements.

What is the role of haptic corn in the absorption of Vitamin B12?

• It converts Vitamin B12 into a soluble form.

• It transports Vitamin B12 directly to the liver.

• It binds to Vitamin B12 to protect it from stomach acid.

• It enhances the taste of Vitamin B12.

Where in the body is Vitamin B12 primarily absorbed?

• In the stomach

• In the duodenum

• In the terminal ileum

• In the large intestine

Which enzyme requires Vitamin B12 to function properly?

• Pepsin

• Homocysteine methyltransferase

• Lactase

• Amylase

What health issue can arise from a buildup of methylmalonic acid due to Vitamin B12 deficiency?

• Diabetes

• Hypertension

• Axonal neuropathy

• Osteoporosis

How much Vitamin B12 is recommended daily for adults?

• 3.6 micrograms

• 2.4 micrograms

• 1.2 micrograms

• 4.8 micrograms

During pregnancy, how much Vitamin B12 is recommended per day?

• 2.0 micrograms

• 2.4 micrograms

• 2.6 micrograms

• 3.0 micrograms