Human Nutrition Fundamentals Flashcards

Which of the following is considered a macronutrient?

Answer: Carbohydrates

Macronutrients are nutrients that the body needs in large amounts to provide energy and support bodily functions. Carbohydrates, along with proteins and fats, are the three primary macronutrients. Vitamins and minerals are micronutrients, needed in smaller quantities, while water is essential but not typically categorized as a macronutrient in the same way.

What is the primary function of proteins in the human body?

Answer: Supporting cell division and growth.

Proteins are fundamental building blocks for every cell in the human body and are essential for growth and repair of tissues. Their primary function includes supporting cell division, synthesizing enzymes and hormones, and building and repairing muscles, skin, and other body tissues. While they can provide energy, it's not their main role compared to carbohydrates and fats.

Which vitamin is essential for the absorption of calcium in the body?

Answer: Vitamin D

Vitamin D is absolutely essential for the absorption of calcium in the intestines. Without adequate Vitamin D, the body cannot effectively absorb calcium, leading to calcium deficiency even if dietary intake is sufficient. This critical role makes Vitamin D vital for maintaining strong bones and teeth, as well as for muscle and nerve function.

Which mineral is necessary for oxygen transport in the blood?

Answer: Iron

Iron is a crucial component of hemoglobin, a protein found in red blood cells. Hemoglobin is responsible for binding to oxygen in the lungs and transporting it throughout the body to tissues and organs. Without sufficient iron, the body cannot produce enough healthy red blood cells, leading to impaired oxygen transport and conditions like anemia.

What is the role of antioxidants in the body?

Answer: Protect cells from damage.

Antioxidants are molecules that combat oxidative stress in the body. Oxidative stress is caused by free radicals, unstable molecules that can damage cells, DNA, and proteins. By neutralizing these free radicals, antioxidants help protect cells from damage, which can reduce the risk of chronic diseases and support overall cellular health.

Which type of fat is considered unhealthy when consumed in excess?

Answer: Trans fats

Trans fats are a type of unsaturated fat that has undergone a process called hydrogenation, making them solid at room temperature. They are considered the unhealthiest type of fat because they raise LDL ('bad') cholesterol and lower HDL ('good') cholesterol. This significantly increases the risk of heart disease, stroke, and type 2 diabetes.

What is the function of dietary fiber in the digestive system?

Answer: Regulate bowel movements.

Dietary fiber, particularly insoluble fiber, adds bulk to stool and helps it move more easily through the digestive tract. This promotes regular bowel movements and prevents constipation. Additionally, soluble fiber can help soften stool and support a healthy gut microbiome.

Which of the following foods is a good source of Omega-3 fatty acids?

Answer: Salmon

Salmon is an excellent source of Omega-3 fatty acids, specifically EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid). These essential fatty acids are crucial for brain health, reducing inflammation, and supporting cardiovascular function. Other fatty fish like mackerel and sardines also provide significant amounts of Omega-3s.

What is the primary benefit of consuming a balanced diet?

Answer: Reduced risk of chronic diseases.

A balanced diet provides the body with essential nutrients, vitamins, and minerals needed for optimal functioning. Consistently consuming a variety of healthy foods helps maintain a healthy weight, supports immune function, and reduces inflammation. This significantly lowers the risk of developing chronic conditions such as heart disease, type 2 diabetes, and certain cancers.