What is the term for "nutrients that our bodies need in relatively large amounts to support normal function and health"?

A. Preparing and serving foods in fun, visually appealing ways can encourage toddlers to try new foods and develop positive associations with healthy eating. This strategy may include using colorful plates, arranging fruits and vegetables into shapes, or offering foods in small, manageable pieces. Early exposure to a variety of healthy foods helps shape long-term preferences and supports balanced nutrition during growth and development.

B. Restricting toddlers from participating in food-related activities, like shopping or meal selection, misses an opportunity to engage them in making healthy choices. Involvement in food preparation can increase interest and willingness to try new foods.

C. Using dessert as a reward for finishing meals may create unhealthy associations between food and behavior, leading to preference for sweets and overeating of less nutritious foods. Positive reinforcement should focus on praise and modeling healthy eating, not on dessert bribes.

D. Providing larger portion sizes can overwhelm toddlers and increase the risk of overeating. Toddlers have small stomach capacities, and appropriate portion sizes should be small and manageable, allowing them to self-regulate hunger cues.

A. While iron plays a role in certain enzymatic reactions in the body, its primary function is not directly related to nervous system function. Nervous system health depends on other nutrients like B vitamins, particularly B12.

B. Iron is essential for oxygen transport in the body. It is a key component of hemoglobin in red blood cells and myoglobin in muscle cells. Hemoglobin binds oxygen in the lungs and carries it to tissues throughout the body, while myoglobin stores and delivers oxygen within muscle cells, supporting energy production during physical activity. Adequate iron is critical for endurance, performance, and preventing fatigue. Iron deficiency can lead to anemia, decreased oxygen-carrying capacity, and impaired physical performance.

C. Iron is not directly used to generate energy from carbohydrates. Carbohydrates are metabolized via glycolysis and the Krebs cycle to produce ATP, but iron’s role is indirect, mainly as a component of hemoglobin and iron-containing enzymes that support oxidative metabolism.

D. While iron deficiency can indirectly affect blood oxygenation and overall cardiovascular function, iron does not directly maintain blood volume or blood pressure. Blood volume is regulated by water balance and electrolytes, while blood pressure depends on vascular resistance, cardiac output, and fluid status.