1.
The health of the gastrointestinal tract is maintained by some ______ different strains of bacteria and other micro-organisms.
Correct Answer
D. 300
Explanation
The health of the gastrointestinal tract is maintained by a large number of different strains of bacteria and other micro-organisms. These micro-organisms play a crucial role in digestion, nutrient absorption, and immune function. With a diverse and abundant population of bacteria, the gastrointestinal tract can effectively break down food, extract nutrients, and protect against harmful pathogens. Therefore, having 300 different strains of bacteria and micro-organisms ensures the proper functioning and health of the gastrointestinal tract.
2.
Due to the body's incredible resilience, most serious diseases like cancer and cardiovascular disease take twenty to thirty years to develop.
Correct Answer
A. True
Explanation
The explanation for the given correct answer is that the body has a remarkable ability to withstand and adapt to various conditions and challenges. This resilience allows it to combat diseases and maintain health for a significant period of time. Diseases like cancer and cardiovascular disease typically require a long period, ranging from twenty to thirty years, to develop and progress to a serious stage. This timeframe is necessary for the accumulation of genetic mutations, cellular damage, and other factors that contribute to the onset of these diseases.
3.
Macro-nutrients include water, vitamins, and fibre.
Correct Answer
B. False
Explanation
The statement is false because macro-nutrients refer to the three main nutrients required in large amounts by the body for energy and growth, namely carbohydrates, proteins, and fats. Water, vitamins, and fiber are not considered macro-nutrients, although they are still important for overall health and well-being.
4.
Vitamin B is an important antioxidant and it prevents the oxidation of vitamin A and polyunsaturated fatty acids in the intestine.
Correct Answer
B. False
Explanation
Vitamin B is not an antioxidant and it does not prevent the oxidation of vitamin A and polyunsaturated fatty acids in the intestine.
5.
Vitamin B-12 differs from other vitamins, as it is only found in animal foods.
Correct Answer
A. True
Explanation
Vitamin B-12 is indeed different from other vitamins because it is exclusively found in animal foods. Unlike other vitamins that can be obtained from both plant and animal sources, vitamin B-12 is only present in animal-derived products such as meat, fish, eggs, and dairy. This is why individuals following a strict vegan or vegetarian diet may need to supplement their intake of vitamin B-12 to avoid deficiencies.
6.
Your digestive tract produces about ______ of enzyme secretions every day to digest part of the ______ of food consumed over a lifetime.
Correct Answer
B. 10 litres and 100 tons
Explanation
The correct answer is 10 litres and 100 tons. The digestive tract produces enzyme secretions to break down and digest food. This answer suggests that the digestive tract produces 10 litres of enzyme secretions every day, which is a significant amount. Additionally, it states that these enzyme secretions are used to digest 100 tons of food consumed over a lifetime, indicating the efficiency and effectiveness of the digestive system.
7.
Vitamins are organic nutrients found in foods and are essential in small quantities for both growth and good health.
Correct Answer
A. True
Explanation
Vitamins are indeed organic nutrients that are necessary for growth and good health. They are found in various foods and are required in small quantities for the proper functioning of the body. Hence, the statement "Vitamins are organic nutrients found in foods and are essential in small quantities for both growth and good health" is true.
8.
______ is needed to make new cells and used to produce adequate numbers of red blood cells and white blood cells.
Correct Answer
D. Folate
Explanation
Folate is needed to make new cells and is used to produce adequate numbers of red blood cells and white blood cells. Folate, also known as vitamin B9, is essential for DNA synthesis and cell division. It plays a crucial role in the production of red blood cells, which carry oxygen throughout the body, and white blood cells, which are important for immune function. Folate deficiency can lead to anemia and impaired immune function. Therefore, folate is necessary for the formation and maintenance of healthy cells in the body.