Mixed Deck — All CNS Topics Flashcards

What is a "control group" in Certified Nutrition Specialist Exam research?

Answer: A group that does not receive the experimental treatment, serving as a baseline comparison

The control group does not receive the experimental treatment or intervention, providing a baseline against which the experimental group's results can be compared to determine the effect of the treatment.

The functions of vitamin K depend largely on which of the following minerals?

Answer: Calcium

Explanation: The functions of vitamin K largely depend on calcium. Vitamin K plays a crucial role in the activation of proteins involved in blood clotting and bone metabolism. These processes require calcium as a cofactor for the proper functioning of vitamin K-dependent enzymes. Therefore, adequate calcium levels are necessary for vitamin K to perform its physiological functions effectively. Understanding the interplay between vitamin K and calcium is fundamental to comprehending their roles in blood coagulation and bone health.

Which type of assessment in Certified Nutrition Specialist Exam compares an individual's performance to a predetermined standard?

Answer: Criterion-referenced assessment

Criterion-referenced assessment compares performance against a fixed set of criteria or standards, determining whether specific competencies have been met regardless of how others perform.

Which condition in late pregnancy, characterized by protein-restricted diets and poor nutrient density, is associated with increased adult offspring risk of cardiovascular disease and type 2 diabetes?

Answer: Developmental origins of health and disease (DOHaD) / fetal programming

The DOHaD hypothesis posits that maternal nutritional deprivation during critical windows programs fetal metabolism, increasing offspring risk of chronic metabolic disease.

Which growth chart system is recommended by the WHO for assessing growth in children under age 2 in the United States and represents optimal growth under ideal nutritional conditions?

Answer: WHO Child Growth Standards

The WHO standards, based on a multinational sample of breastfed children raised under optimal conditions, represent 'how children should grow' and are recommended for children under 2 in the US.

What is the primary cause of the reduced vitamin B12 absorption commonly seen in older adults, often requiring supplementation with crystalline B12?

Answer: Atrophic gastritis reducing intrinsic factor and gastric acid

Atrophic gastritis, prevalent in 10–30% of older adults, reduces gastric acid and intrinsic factor secretion, impairing protein-bound B12 digestion but sparing absorption of crystalline (free) B12.

Which of the following is a major function of vitamin E?

Answer: Protection of biological membranes from free radical damage

Explanation: A major function of vitamin E is the protection of biological membranes from free radical damage. As an antioxidant, vitamin E helps neutralize free radicals, which are highly reactive molecules that can damage cell membranes and other cellular structures. By scavenging free radicals, vitamin E helps maintain the integrity of cell membranes and protects cells from oxidative stress. Understanding the antioxidant role of vitamin E is fundamental to recognizing its importance in overall health and its potential role in preventing chronic diseases associated with oxidative damage.

What is a best practice in Certified Nutrition Specialist Exam macronutrients?

Answer: A method or technique recognized as superior based on evidence and expert consensus

Best practices are methods, techniques, or approaches that are recognized through evidence, research, and expert consensus as producing superior results and are recommended for adoption.

Which of the following best describes the upper tolerable intake level (UL) concern with preformed vitamin A supplementation in pregnant women?

Answer: Doses above 3,000 mcg RAE/day are associated with teratogenicity

Preformed vitamin A (retinol) at doses exceeding 3,000 mcg RAE per day during pregnancy is associated with fetal birth defects; provitamin A carotenoids like beta-carotene do not carry this risk.

In Certified Nutrition Specialist Exam, what does "statistical significance" mean?

Answer: The result is unlikely to have occurred by chance alone (typically p < 0.05)

Statistical significance indicates that an observed result is unlikely to have occurred by random chance, typically when the p-value is less than 0.05 (5% probability of occurring by chance).

During the second trimester of pregnancy, the recommended additional energy intake above pre-pregnancy needs is approximately how many kcal/day?

Answer: 340 kcal/day

The IOM recommends approximately 340 extra kcal/day in the second trimester and 452 kcal/day in the third trimester above pre-pregnancy energy needs.

Most of the body's magnesium is found in:

Answer: bones

Explanation: Most of the body's magnesium is found in bones. Magnesium is an essential mineral that contributes to bone structure and strength. It plays a vital role in bone mineralization by interacting with calcium and other minerals in the bone matrix. Understanding the distribution of magnesium in the body, particularly its abundance in bones, is fundamental to recognizing its importance in bone health and overall physiology.

In Certified Nutrition Specialist Exam, what does "standard precautions" in infection control include?

Answer: Hand hygiene, use of PPE, and safe handling of sharps for all patient contact

Standard precautions are infection control practices applied to ALL patient care regardless of infection status, including hand hygiene, appropriate PPE use, safe sharps handling, and respiratory hygiene.

What is the purpose of peer review in Certified Nutrition Specialist Exam research methods?

Answer: To have qualified experts evaluate research quality before publication

Peer review involves independent evaluation of research by qualified experts in the field, assessing methodology, validity, significance, and contribution to knowledge before publication.

Which factor most significantly enhances the intestinal absorption of non-heme iron from a supplement?

Answer: Co-ingesting the supplement with vitamin C (ascorbic acid)

Vitamin C reduces ferric iron (Fe³⁺) to the more soluble ferrous form (Fe²⁺) and forms a soluble chelate, both of which substantially enhance non-heme iron absorption in the intestine.

Iodine requirements increase during pregnancy primarily to support which fetal developmental need?

Answer: Fetal thyroid hormone synthesis for brain development

The fetal thyroid begins functioning around 18–20 weeks; adequate maternal iodine is critical throughout pregnancy for thyroid hormone production needed for fetal neurodevelopment.

Which of the following situations might warrant dietary supplementation?

Answer: All of the above

Explanation: All of the situations listed might warrant dietary supplementation. Vegetarianism may require supplementation of nutrients commonly found in animal products, such as vitamin B12 and iron. Lactose intolerance might necessitate supplementation of calcium and vitamin D if dairy products are restricted. Limited time for food preparation might lead to inadequate intake of essential nutrients, prompting the need for supplementation to fill nutritional gaps. Understanding when dietary supplementation may be necessary is crucial for providing appropriate dietary guidance in line with nutrition and dietary guidelines.

Calcitonin is released by the ____________ during periods of ___________ blood calcium concentration.

Answer: thyroid gland; high

Explanation: Calcitonin is a hormone primarily produced by the thyroid gland. Its primary function is to regulate calcium levels in the blood. When blood calcium levels are high, such as after a meal, the thyroid gland releases calcitonin. Calcitonin acts to lower blood calcium levels by inhibiting the activity of osteoclasts, cells responsible for breaking down bone tissue and releasing calcium into the bloodstream. By inhibiting osteoclast activity, calcitonin helps to promote calcium deposition into bone, thereby reducing blood calcium levels. This process helps maintain calcium homeostasis in the body.

In healthy term infants, which vitamin is routinely administered as an intramuscular injection at birth to prevent hemorrhagic disease?

Answer: Vitamin K

Newborns have very low vitamin K stores and limited gut microbiota to synthesize it; IM vitamin K1 injection prevents vitamin K deficiency bleeding (VKDB).

A CNS practitioner suspects pyrrole disorder (pyroluria) in a patient with anxiety, poor stress tolerance, and white spots on nails. Which two nutrients are primarily depleted?

Answer: Zinc and vitamin B6 (P5P)

Pyrroles bind zinc and vitamin B6 (as pyridoxal-5-phosphate) and are excreted in urine, depleting these cofactors needed for neurotransmitter synthesis.