DH 209 Nutrition Exam

Correct Answer:

B. First is true, second false

Explanation of the Correct Answer:

Vitamin C is indeed essential for collagen formation, which is necessary for the strength and integrity of tissues and capillaries. It plays a crucial role in wound healing and maintaining the structure of connective tissues. However, the second statement is false. Vitamin C is not known as the "sunshine vitamin"; that term refers to Vitamin D. Vitamin D is synthesized in the skin through exposure to sunlight, hence its nickname.

Why the Other Options Are Incorrect:

A. First is false, second true

This option is incorrect because the first statement about Vitamin C's role in collagen formation is true, but the second statement about Vitamin C being the "sunshine vitamin" is false; it is Vitamin D that holds that title.

C. Both are false

This option is incorrect because the first statement about Vitamin C's role is accurate, and only the second statement is false.

D. Both are true

This option is incorrect because the first statement about Vitamin C is true, but the second statement regarding Vitamin C being the "sunshine vitamin" is false.

Summary:

Vitamin C is crucial for collagen formation, tissue strengthening, and capillary integrity. However, Vitamin C is not the "sunshine vitamin"; that term refers to Vitamin D.

Correct Answer:

A. Milk

Explanation of the Correct Answer:

Milk is an excellent source of high-quality protein, particularly because it contains all the essential amino acids. It is rich in casein and whey proteins, both of which are easily digestible and beneficial for maintaining muscle mass, bone health, and overall nutritional needs. For an edentulous patient, milk is a great alternative since it can be consumed easily without the need for chewing, and it provides sufficient protein along with other important nutrients like calcium and vitamin D.

Why the Other Options Are Incorrect:

B. Fruits:

Fruits are not a significant source of protein. They are generally rich in vitamins, minerals, and fiber, but they provide very little protein compared to other food sources like dairy, meat, or legumes.

C. Vegetables:

While some vegetables, like legumes and soy products (e.g., tofu), can provide some protein, most vegetables are not rich in protein. Vegetables are primarily a good source of fiber, vitamins, and minerals, but they do not match dairy products in terms of protein content.

D. Grains:

Grains, such as rice, wheat, or oats, do provide some protein, but they are generally not as protein-dense as dairy products. Grains are a better source of carbohydrates and fiber, and while they contribute to overall protein intake, they do not provide the same high-quality protein as milk.

Correct Answer: D. Regulates body temperature through excretion of urine

Explanation of the Correct Answer:

D is correct because while water is crucial for regulating body temperature, it does not directly regulate body temperature through urine excretion. Instead, the primary role of water in temperature regulation is through sweating and evaporation from the skin, which help cool the body down. Excretion of urine, while important for maintaining fluid balance and waste removal, is not a primary method of regulating body temperature.

Why the Other Options are Incorrect:

A. Maintains stability of body fluids, ICF and ECF

This is incorrect because water is essential for maintaining the balance of body fluids, both intracellular fluid (ICF) and extracellular fluid (ECF). Water helps in maintaining cellular integrity and the appropriate balance of fluids inside and outside the cells, which is essential for normal physiological functions.

B. Acts as a solvent for chemical reactions

This is incorrect because water is a universal solvent, meaning it dissolves many substances, including nutrients, gases, and waste products. This allows chemical reactions within cells and tissues to occur efficiently, such as enzymatic reactions that are necessary for metabolism.

C. Enables transport of nutrients and excretion of waste

This is incorrect because water is essential for transporting nutrients to cells and removing waste products. Water is the medium in which substances are dissolved and transported via the blood and lymphatic systems, and it plays a key role in the excretion of waste through the kidneys and urine.

Correct Answer:

C. Provide energy for body functions.

Explanation of the Correct Answer:

The principal role of absorbed glucose is to provide energy for body functions. Glucose is the body’s primary and most efficient source of energy. It is absorbed into the bloodstream from the digestive tract, and from there, it is transported to cells to fuel processes like muscle contraction, brain activity, and maintaining body temperature. It is especially important for high-energy-demand organs like the brain, which relies heavily on glucose for its energy needs.

Why the Other Options Are Incorrect:

A. Accelerate gastrointestinal motility:

Glucose does not play a direct role in accelerating gastrointestinal motility. The movement of food through the digestive tract is controlled by various factors, including nerve signals and hormones like gastrin, not directly by glucose.

B. Encourage the growth of bacteria:

While some types of bacteria in the gut can ferment carbohydrates (including glucose), this is not the principal role of glucose in the body. The primary purpose of glucose is to provide energy for the body's cells, rather than to encourage bacterial growth.

D. Lipogenesis:

Lipogenesis refers to the process of converting glucose into fat. While glucose can be converted into fat for storage, this is a secondary process. The main role of glucose is energy provision, not fat production. Lipogenesis occurs mainly when glucose is in excess and energy needs are already met.

Correct Answer:

B. Substitute saturated fats with high carbohydrate foods.

Explanation of the Correct Answer:

The Dietary Guidelines recommend that people limit their intake of saturated fats (SFAs) and trans fats, but they do not recommend substituting these fats with high-carbohydrate foods. Instead, the focus is on replacing unhealthy fats with healthier fats, such as monounsaturated fats (found in olive oil, avocados) and polyunsaturated fats (found in nuts, seeds, and fish). Excessive carbohydrate intake, particularly refined carbohydrates, can lead to other health issues, such as increased risk for metabolic disorders and obesity.

Why the Other Options Are Correct:

A. Less than 10% of kilocalories should come from saturated fats:

This is a recommendation in the Dietary Guidelines. They suggest that less than 10% of total daily kilocalories should come from saturated fats in order to reduce the risk of heart disease and promote overall health.

C. Consumption of SFAs and trans fats should be as low as possible:

This is correct. The Dietary Guidelines emphasize the importance of keeping both saturated fats (SFAs) and trans fats to a minimum because they are linked to higher cholesterol levels and increased risk of heart disease.

D. Replace saturated fats with monounsaturated and polyunsaturated fat:

This is also a recommendation in the Dietary Guidelines. It suggests that people replace saturated fats with healthier fats, such as monounsaturated and polyunsaturated fats, which have been shown to benefit heart health and reduce the risk of cardiovascular disease.

Correct Answer:

D. Weight gain

Explanation of the Correct Answer:

Weight gain is not typically a symptom of type 1 diabetes mellitus. In fact, people with type 1 diabetes often experience weight loss despite increased appetite (polyphagia) because their bodies are unable to effectively use glucose for energy due to insulin deficiency. The body then breaks down muscle and fat for energy, leading to weight loss.

Why the Other Options Are Correct:

A. Polyphagia: This refers to increased hunger. In type 1 diabetes, the body can't effectively use glucose due to lack of insulin, which causes cells to send hunger signals to the brain. This leads to excessive hunger or polyphagia.

B. Ketoacidosis: Diabetic ketoacidosis (DKA) is a potentially life-threatening condition common in type 1 diabetes. It occurs when the body starts breaking down fat for energy due to a lack of insulin, producing ketones, which can lead to ketoacidosis.

C. Polydipsia: This refers to increased thirst, which occurs in type 1 diabetes due to dehydration caused by excessive urination (polyuria) as the kidneys attempt to excrete excess glucose.

E. Polyuria: Excessive urination is another symptom of type 1 diabetes. High blood glucose levels cause the kidneys to work harder to filter and absorb the excess glucose, leading to more frequent urination.

Correct Answer:

B. True

Explanation of the Correct Answer:

Saturated fatty acids can undergo partial hydrogenation to be converted into tub spread margarine. Hydrogenation is a process that adds hydrogen atoms to unsaturated fatty acids, which can convert them into more saturated forms. In partial hydrogenation, not all double bonds in the unsaturated fatty acids are converted to single bonds, which results in the formation of trans fats. This process is commonly used in the production of margarine, including tub spreads, to alter the consistency and extend shelf life, although the resulting trans fats are associated with increased health risks.

Why the Other Option Is Incorrect:

A. False

This statement is incorrect because partial hydrogenation is indeed used to convert unsaturated fatty acids into margarine, including tub spread margarine. While the process may not convert all unsaturated fats into fully saturated fats, it can lead to the creation of margarine-like spreads.

Summary:

Saturated fatty acids can undergo partial hydrogenation, a process that is used in the production of margarine, including tub spreads. The correct answer is B: True.

Correct Answer:

A. Both statements are true.

Explanation of the Correct Answer:

The first statement is true because caries (tooth decay) and periodontal disease (gum disease) are indeed the leading causes of tooth loss in patients older than 65 years. As people age, the risk for developing these conditions increases, particularly due to factors like reduced saliva production, poorer oral hygiene, and the effects of certain medications.

The second statement is also true because nutritional deficiencies can affect the body's immune response to periodontal disease. For example, deficiencies in vitamins C and D can impair the healing of gum tissue, while a lack of calcium and other essential nutrients can weaken the bone supporting the teeth, making it harder for the body to fight off periodontal infection.

Why the Other Options Are Incorrect:

B. The first statement is true; the second is false.

This is incorrect because both statements are true. Nutritional deficiencies do indeed modify the body's response to periodontal disease.

C. The first statement is false; the second is true.

This is incorrect because the first statement is true. Caries and periodontal disease are leading causes of tooth loss in older adults.

D. Both statements are false.

This is incorrect because both statements are true. Caries and periodontal disease are major causes of tooth loss in the elderly, and nutritional deficiencies do affect the response to periodontal disease.

Summary:

Both statements are true. Caries and periodontal disease are the leading causes of tooth loss in patients older than 65 years, and nutritional deficiencies can alter the body's ability to respond to periodontal disease.

Correct Answer: E. Making eye contact

Explanation of the Correct Answer:

E is correct because making eye contact is actually a crucial component of active listening, not an impediment. Good eye contact shows attentiveness, respect, and engagement with the speaker. It helps establish trust and encourages open communication, all of which are essential aspects of effective active listening.

Why the Other Options are Incorrect:

A. Preparing a response while the other person is speaking

This is an impediment to active listening because it shifts focus away from truly understanding the speaker’s message. When one is formulating a response instead of fully listening, important information may be missed, and it can result in misunderstandings.

B. Finishing the speaker's sentences

This is an impediment because it interrupts the speaker’s natural communication and can come across as disrespectful or impatient. It assumes you already know what the speaker is going to say, which can discourage them from fully expressing themselves.

C. Multitasking

This is an impediment because it divides attention. Active listening requires full focus on the speaker. Multitasking suggests that the speaker’s message is not important enough to deserve undivided attention, which can harm communication.

D. Interrupting

This is an impediment because it disrupts the speaker’s flow of thought, often leading to frustration and breakdowns in communication. It shows a lack of patience and consideration, essential qualities for active listening.

Summary:

Making eye contact supports active listening rather than impeding it, making E the correct answer. Preparing a response while someone is talking, finishing their sentences, multitasking, and interrupting are all behaviors that interfere with truly understanding and connecting with the speaker.