IIN Gut Health & Microbiome 2

Question 1

Which fermented food is traditionally made from salted, fermented cabbage and is rich in Lactobacillus bacteria?

Accepted Answer

Sauerkraut

Answer

Sauerkraut is made from salted, fermented cabbage and contains Lactobacillus species that support gut microbiome diversity.

Question 2

The gut-brain axis communicates primarily through which nerve?

Accepted Answer

Vagus nerve

Answer

The vagus nerve is the primary pathway of the gut-brain axis, transmitting signals bidirectionally between the enteric and central nervous systems.

Question 3

Approximately what percentage of the body's serotonin is produced in the gut?

Accepted Answer

95%

Answer

About 95% of the body's serotonin is produced by enterochromaffin cells in the gut, highlighting the gut's role in mood regulation.

Question 4

Which type of dietary fiber selectively feeds beneficial bacteria and is classified as a prebiotic?

Accepted Answer

Inulin

Answer

Inulin is a prebiotic fiber found in foods like chicory root and garlic that selectively stimulates growth of beneficial Bifidobacterium and Lactobacillus species.

Question 5

Intestinal permeability, sometimes called 'leaky gut,' refers to increased permeability of which structure?

Accepted Answer

The tight junctions between epithelial cells

Answer

Leaky gut involves breakdown of tight junctions between intestinal epithelial cells, allowing undigested particles and toxins to pass into the bloodstream.

(IIN) Institute for Integrative Nutrition Certification Practice Test

(IIN) Institute for Integrative Nutrition Certification Practice Test

IIN Gut Health & Microbiome 2