IIN Nutrition Science 3

Question 1

Which macronutrient provides 9 calories per gram?

Accepted Answer

Fat

Answer

Dietary fat is the most energy-dense macronutrient, providing 9 kcal per gram compared to 4 kcal/g for protein and carbohydrate.

Question 2

What is the role of secretory IgA (sIgA) in gut health?

Accepted Answer

It is the primary antibody defending mucosal surfaces from pathogens

Answer

Secretory IgA is the dominant immunoglobulin in the gut lumen and protects mucosal surfaces by neutralizing pathogens and toxins.

Question 3

Which mineral deficiency is most commonly associated with goiter (enlarged thyroid gland)?

Accepted Answer

Iodine

Answer

Iodine is essential for thyroid hormone synthesis; deficiency causes the thyroid gland to enlarge in an attempt to capture more iodine from the blood.

Question 4

Short-chain fatty acids (SCFAs) like butyrate, propionate, and acetate are produced when gut bacteria ferment:

Accepted Answer

Dietary fiber and resistant starch

Answer

Gut microbiota ferment indigestible dietary fiber and resistant starch to produce SCFAs, which nourish colonocytes and support gut health.

Question 5

According to IIN's 'Plate' approach, which component should make up the largest portion of a healthy meal?

Accepted Answer

Non-starchy vegetables

Answer

IIN emphasizes filling half or more of the plate with non-starchy vegetables to maximize micronutrient and fiber intake.

(IIN) Institute for Integrative Nutrition Certification Practice Test

(IIN) Institute for Integrative Nutrition Certification Practice Test

IIN Nutrition Science 3