NTP Macronutrient & Micronutrient Science 3

Question 1

Which lipoprotein is responsible for transporting dietary triglycerides from the intestine to peripheral tissues?

Accepted Answer

Chylomicrons

Answer

Chylomicrons are large lipoproteins assembled in enterocytes that carry dietary triglycerides and fat-soluble vitamins through the lymphatic system to peripheral tissues.

Question 2

What is the consequence of a selenium deficiency on thyroid hormone metabolism?

Accepted Answer

Impaired conversion of T4 to active T3 due to reduced deiodinase activity

Answer

Selenium-dependent iodothyronine deiodinases convert the prohormone T4 to the active T3; selenium deficiency reduces this conversion.

Question 3

In the NTP model, which macronutrient is considered the 'preferred' fuel for the body in an ancestral/foundational diet context?

Accepted Answer

Fat (including saturated fats from whole food sources)

Answer

Nutritional Therapy emphasizes that dietary fat, particularly from whole food sources, is a preferred and efficient fuel supporting metabolic health.

Question 4

Which amino acid serves as the primary gluconeogenic precursor released from skeletal muscle during prolonged fasting?

Accepted Answer

Alanine

Answer

Alanine is the major amino acid shuttled from muscle to the liver for gluconeogenesis via the glucose-alanine cycle.

Question 5

Vitamin C (ascorbic acid) enhances the absorption of which form of dietary iron, and by what mechanism?

Accepted Answer

Non-heme iron, by reducing Fe³⁺ to Fe²⁺ in the gut lumen

Answer

Vitamin C reduces ferric iron (Fe³⁺) to ferrous iron (Fe²⁺), the form absorbed by the DMT1 transporter, enhancing non-heme iron uptake.

(NTP) Nutritional Therapy Practitioner Practice Test

(NTP) Nutritional Therapy Practitioner Practice Test

NTP Macronutrient & Micronutrient Science 3