Clinical Nutritionist CCN Trivia 5

Question 1

Which carotenoid found in tomatoes and watermelon is associated with reduced risk of prostate cancer in epidemiological studies?

Accepted Answer

Lycopene

Answer

Lycopene is a red carotenoid with potent antioxidant activity; observational studies link higher lycopene intake with lower prostate cancer risk.

Question 2

Which type of dietary fiber, found in oats and barley, has strong evidence for lowering LDL cholesterol?

Accepted Answer

Beta-glucan

Answer

Beta-glucan forms a viscous gel in the gut that binds bile acids, increasing their fecal excretion and forcing the liver to convert more cholesterol into new bile.

Question 3

In the context of protein quality, which scoring method endorsed by the FAO/WHO accounts for both amino acid content and digestibility?

Accepted Answer

Protein Digestibility-Corrected Amino Acid Score (PDCAAS)

Answer

PDCAAS multiplies a food's amino acid score (relative to human needs) by its true fecal digestibility, yielding a score capped at 1.0.

Question 4

A CCN client reports numbness and tingling in hands and feet after months of high-dose supplementation with which B vitamin?

Accepted Answer

Pyridoxine (B6)

Answer

Chronic high-dose vitamin B6 supplementation (>100–200 mg/day) can cause sensory peripheral neuropathy that is reversible upon discontinuation.

Question 5

Which organ secretes the hormone insulin in response to elevated blood glucose levels?

Accepted Answer

Pancreatic beta cells

Answer

Insulin is synthesized and secreted by the beta cells of the islets of Langerhans in the pancreas in response to postprandial hyperglycemia.

Clinical Nutritionist CCN Practice Test

Clinical Nutritionist CCN Practice Test

Clinical Nutritionist CCN Trivia 5