NS 1400 Prelim 1 Questions & Answers 2026/2027 | Disease, Health Determinants, Obesity, BMI, Energy Balance & Adipose Tissue

This NS 1400 Prelim 1 2026/2027 study document provides a comprehensive 17-page question-and-answer review covering health and disease, determinants of health, obesity, body composition, energy homeostasis, appetite regulation, metabolism, the gut microbiome, and adipose tissue biology. It begins by distinguishing disease from health and reviews the WHO definition of health alongside an adaptation and self-management approach to physical, mental, and social well-being. The material then examines biological, behavioral, socioeconomic, environmental, healthcare, and policy-related determinants that can influence individual and population health. A major section focuses on biological determinants and methods of assessing body composition and health risk. Topics include genetics, anatomy, physiology, bone density, blood pressure, pulmonary and sensory function, biochemical markers, anthropometry, BMI, waist-to-hip ratio, waist circumference, skinfold measurements, hydrostatic weighing, air-displacement plethysmography, dual-energy X-ray absorptiometry, and bioelectrical impedance. The document also reviews BMI classifications for underweight, normal weight, overweight, obesity, and severe obesity while discussing important limitations of BMI as a measure of health risk. The obesity section examines energy intake versus expenditure, reduced physical activity, food environments, sugar-sweetened beverages, food deserts, socioeconomic influences, and the relative price and availability of unhealthy foods. It also discusses obesity-related consequences involving cardiovascular disease, diabetes, osteoarthritis, cancer, mood disorders, and other health concerns, alongside direct medical costs, productivity costs, and other economic implications. Patterns involving obesity prevalence, income, education, sex, age, race and ethnicity are also addressed within the study material. Students also receive detailed coverage of body-fat distribution and energy homeostasis. The document distinguishes android from gynoid obesity and subcutaneous from visceral adipose tissue, emphasizing the relationship between visceral fat and obesity-associated health risks. The first law of thermodynamics is applied to positive and negative energy balance, while factors governing energy intake and expenditure include hunger, sensory and cognitive influences, satiation, satiety, physical activity, resting energy expenditure, sleep, ambient temperature, and the thermic effect of food. The material further explores the neuroendocrine regulation of appetite and metabolism, including the hypothalamus, pancreas, gastrointestinal tract and adipose tissue. Important hormones and pathways reviewed include leptin, insulin, amylin, GLP-1, oxyntomodulin, peptide YY, cholecystokinin, GIP and ghrelin, as well as orexigenic AgRP/NPY and anorexigenic POMC pathways. Short- and long-term appetite regulation, negative-feedback mechanisms, basal metabolic rate, physical-activity energy expenditure, and postprandial thermogenesis are included. The final sections cover the gut microbiome and adipose tissue physiology. Students review the role of gastrointestinal microorganisms in nutrient metabolism, vitamin synthesis, short-chain fatty-acid production, appetite regulation and neuroendocrine signaling. The document also distinguishes white, brown and beige adipose tissue, explains the basic functions of adipocytes, and contrasts adipocyte hyperplasia with hypertrophy in obesity, including the relationship between hypertrophy, immune-cell migration, hypoxia, and chronic inflammation. Relevant Students: NS 1400 students, undergraduate health science students, nursing and pre-nursing students, public health students, nutrition students, pre-medical students, human physiology students, population health students, students studying obesity and metabolic health, and students preparing for examinations covering health determinants, BMI, body composition, energy balance, appetite regulation, metabolism, gut microbiome, and adipose tissue. Keywords: NS 1400 Prelim 1, NS 1400 Prelim 1 2026, NS 1400 Prelim 1 2027, NS 1400 questions and answers, NS 1400 exam questions, NS 1400 study guide, disease and health questions, determinants of health, biological determinants of health, obesity exam questions, obesity study guide, BMI questions and answers, body mass index, waist to hip ratio, body composition assessment, anthropometry, obesity prevalence, energy balance, energy homeostasis, appetite regulation, leptin and ghrelin, insulin appetite regulation, GLP 1, POMC neurons, AgRP NPY neurons, gut hormones, basal metabolic rate, energy expenditure, thermic effect of food, gut microbiome, visceral adipose tissue, subcutaneous adipose tissue, android obesity, gynoid obesity, white adipose tissue, brown adipose tissue, beige adipose tissue, adipocyte hypertrophy, adipocyte hyperplasia, public health exam prep