Class 12 Home Science Part II Chapter 2 Public Nutrition and Health Solutions

Discover Class 12 Home Science Part II Chapter 2 Public Nutrition and Health Solutions with NCERT-based textual questions and answers, additional important questions, and exam-oriented solutions for effective board exam preparation.

Class 12 Home Science Part II Chapter 2 Public Nutrition and Health Solutions

Review Questions with Solutions

1. What is the significance of the study of clinical nutrition and Dietetics?

Ans: The study of clinical nutrition and dietetics is important in healthcare because it deals with the relationship between nutrition, health, and disease. It helps in preventing and managing various diseases and in maintaining or improving the nutritional status of patients. Clinical nutrition focuses particularly on the nutritional management of people with established diseases.

Illness and its treatment can affect nutritional status in several ways. They may impair a person’s ability to eat or swallow and may interfere with digestion, absorption, metabolism, or excretion. If the illness becomes more severe, several body functions may be affected.

In such conditions, it is important to ensure that the patient receives adequate and appropriate nutrition. A trained dietitian, medical nutrition therapist, or clinical nutritionist assesses the patient’s nutritional needs and develops an appropriate nutrition-care plan. The professional follows a systematic nutrition-care process that considers the patient’s individual needs and provides holistic nutritional care. Thus, clinical nutrition and dietetics play an important role in supporting recovery, maintaining health, and improving the quality of life of patients.

2. What are the types of dietary modifications that a medical nutrition therapist may make?

Ans: A nutritional care plan aims to provide adequate amounts of all essential nutrients according to the person’s age, sex, physiological state, occupation, and health condition. Depending on the patient’s condition, a medical nutrition therapist may make several types of dietary modifications.

(i) Changes in consistency: Depending on the patient’s condition, the diet may be modified into liquid, soft, or regular consistency.

(a) Liquid diets: Liquid diets consist mainly of foods and fluids that are liquid at room temperature. A full-liquid diet may include foods such as milk, buttermilk, soups, fruit juices, coconut water, and milkshakes, depending on the patient’s nutritional requirements. Such diets may be used when a patient has difficulty chewing or swallowing or when a liquid consistency is medically indicated. A clear-liquid diet contains transparent liquids such as clear soups, strained juices without pulp, and other suitable clear fluids. Clear-liquid diets are sometimes prescribed for a short period, including around certain surgical or diagnostic procedures. However, a clear-liquid diet is generally not nutritionally complete and therefore should not be continued for a prolonged period unless medically indicated.

(b) Soft diets: Soft diets contain foods that are easy to chew and digest. They may include foods such as khichdi and sago preparations, depending on the patient’s nutritional needs. Foods that are difficult to chew or that may cause gastrointestinal discomfort can be avoided or modified.

A mechanical soft diet is a modification in which food is softened, mashed, chopped, or pureed to make it easier to chew and swallow. It may be useful for people who have difficulty chewing. The exact composition of a soft or mechanical-soft diet depends on the patient’s medical condition and individual requirements.

(ii) Feeding routes: Oral feeding is generally the preferred route when the patient can safely eat, swallow, digest, and absorb food. However, some patients may be unable to eat or swallow safely because of conditions such as unconsciousness, severe swallowing difficulties, or certain disorders of the gastrointestinal tract.

(a) Tube feeding: Tube feeding, also called enteral feeding, provides nutrition through a feeding tube into the gastrointestinal tract. Depending on the clinical requirement, the tube may be inserted through the nose into the stomach or intestine, or it may be placed directly into the gastrointestinal tract.

(b) Intravenous feeding: Intravenous feeding, or parenteral nutrition, provides nutrients directly into the bloodstream through a vein. It may be used when the gastrointestinal tract cannot be used adequately for nutrition. When the gastrointestinal tract is functional and the patient can safely digest and absorb nutrients, enteral feeding is generally preferred over parenteral nutrition.

3. Why do we need dietary changes to prevent chronic diseases? How are they linked with lifestyle?

Ans: Dietary changes are important for reducing the risk of chronic diseases because food choices influence body weight, blood glucose, blood lipids, blood pressure, and overall health. A diet high in highly processed foods, added sugars, unhealthy fats, and excess energy, combined with inadequate intake of fruits, vegetables, whole grains, and other nutrient-rich foods, may increase the risk of conditions such as obesity, type 2 diabetes, cardiovascular diseases, and some cancers.

A balanced diet that provides adequate nutrients and appropriate amounts of energy, along with regular physical activity, can help maintain a healthy body weight and reduce the risk of chronic diseases. Dietary habits are closely related to lifestyle. Physical inactivity, excessive alcohol consumption, smoking, inadequate sleep, and prolonged stress can also negatively affect health. Therefore, prevention of chronic diseases requires a healthy lifestyle that combines appropriate dietary practices with regular physical activity and other healthy behaviours.

4. What are the roles performed by a dietitian? How does the dietitian form a team in patient care with other health care Professionals?

Ans: A dietitian assesses the nutritional status and dietary needs of individuals and provides appropriate nutrition advice and dietary care. The roles of a dietitian may include planning therapeutic diets, providing nutrition counselling and education, monitoring patients’ nutritional progress, modifying dietary plans when necessary, and promoting healthy eating practices.

A dietitian works as a member of a multidisciplinary healthcare team along with doctors, nurses, pharmacists, physiotherapists, and other healthcare professionals, as appropriate. The dietitian shares relevant nutritional information, contributes to patient assessment and care planning, and adjusts the nutrition-care plan according to the patient’s medical condition, treatment, nutritional status, and progress. This teamwork helps provide comprehensive and patient-centred care.

5. How can we prepare for a career in clinical nutrition and dietetics?

Ans: A career in clinical nutrition and dietetics requires appropriate education, practical training, and professional skills. Students can pursue relevant undergraduate education in nutrition, dietetics, food science, or related fields and may pursue postgraduate study or other recognized professional training as appropriate.

Practical training or supervised experience in hospitals, clinics, community health programmes, or other relevant settings helps students develop skills in nutritional assessment, counselling, therapeutic diet planning, and patient care. Good communication, empathy, critical thinking, problem-solving, and interpersonal skills are also important.

Students should also keep themselves updated with developments in nutrition science and evidence-based practice through continuing education, professional training, and reliable scientific sources. The exact educational qualifications, registration, licensing, or professional requirements vary from country to country and should therefore be checked according to the applicable regulations.

6. How does illness/disease affect nutritional status of a person?

Ans: Illness and disease can adversely affect a person’s nutritional status in several ways. A disease may reduce appetite or make it difficult to eat or swallow. It may also interfere with digestion, absorption, metabolism, or the utilization of nutrients. Some illnesses increase the body’s energy and nutrient requirements because the body needs additional nutrients for immune responses, tissue repair, and recovery.

Prolonged or repeated illnesses, such as diarrhoeal diseases, can lead to loss of nutrients and fluids and may reduce nutrient absorption. As a result, illness and inadequate nutrition can reinforce each other, creating a cycle in which poor nutritional status may weaken the body and increase vulnerability to further illness. Appropriate nutritional care during illness and recovery is therefore important for maintaining nutritional status and supporting healing.

Additional Questions with Solutions

(Class 12 Part II Chapter 2 Public Nutrition and Health Solutions)

Multiple Choice Questions (MCQs)

1. What is the primary focus of clinical nutrition?

(a) Designing sports equipment
(b) Nutritional management of people with disease
(c) Manufacturing medicines
(d) Performing surgical procedures

Ans: (b) Nutritional management of people with disease

2. Which route of feeding uses the gastrointestinal tract?

(a) Parenteral feeding
(b) Intravenous feeding
(c) Enteral feeding
(d) Intramuscular feeding

Ans: (c) Enteral feeding

3. Which of the following is generally preferred when a patient can safely use the gastrointestinal tract?

(a) Enteral feeding
(b) Parenteral nutrition
(c) No nutritional support
(d) Intramuscular feeding

Ans: (a) Enteral feeding

4. Which of the following is an important role of a dietitian?

(a) Performing major surgery
(b) Planning appropriate dietary care
(c) Prescribing antibiotics independently
(d) Performing laboratory surgery

Ans: (b) Planning appropriate dietary care

5. Which lifestyle factor can increase the risk of chronic diseases?

(a) Regular physical activity
(b) Balanced diet
(c) Physical inactivity
(d) Adequate sleep

Ans: (c) Physical inactivity

Short Answer Type Questions

1. What is clinical nutrition?

Ans: Clinical nutrition is the application of nutrition science to the prevention and nutritional management of disease and the care of patients.

2. Who is a dietitian?

Ans: A dietitian is a trained nutrition professional who provides nutrition assessment, counselling, and dietary care according to an individual’s needs and health condition.

3. What is a clear-liquid diet?

Ans: A clear-liquid diet consists mainly of transparent liquids such as clear soups and strained juices without pulp and is generally used for a short period when medically indicated.

4. What is enteral feeding?

Ans: Enteral feeding is the provision of nutrients through a feeding tube into the gastrointestinal tract.

5. What is parenteral nutrition?

Ans: Parenteral nutrition is the provision of nutrients directly into the bloodstream through a vein when the gastrointestinal tract cannot be adequately used.

6. Why is a soft diet given to some patients?

Ans: A soft diet may be given to patients who need foods that are easier to chew and digest.

7. Name any two chronic diseases that are influenced by dietary and lifestyle factors.

Ans: Type 2 diabetes and cardiovascular disease.

8. Why is a dietitian a member of the healthcare team?

Ans: A dietitian provides nutritional assessment and dietary care and works with other healthcare professionals to support comprehensive patient care.

9. How can illness affect food intake?

Ans: Illness can reduce appetite or impair a person’s ability to chew, swallow, digest, or absorb nutrients.

10. Why is adequate nutrition important during illness?

Ans: Adequate nutrition helps maintain nutritional status and provides nutrients needed for immune function, tissue repair, and recovery. 0 0 0

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