Week 2
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Questions and Answers

What are the four main tissue types that make up the human body?

  • Nervous, Epithelial, Muscular, Connective (correct)
  • Nervous, Epithelial, Muscular, Dermal
  • Nervous, Endocrine, Muscular, Skeletal
  • Nervous, Epithelial, Muscular, Vascular
  • Which of the following is NOT a model of body composition?

  • Biological (correct)
  • Chemical
  • Tissue
  • Structural
  • What is the most abundant element in the human body?

  • Nitrogen
  • Hydrogen
  • Oxygen (correct)
  • Carbon
  • Which of the following is NOT a factor that contributes to the prevalence of obesity?

    <p>Neurological Function (B)</p> Signup and view all the answers

    What are the two main categories of fat in the body?

    <p>Essential and Storage (D)</p> Signup and view all the answers

    What is the primary reason why we would use anthropometry to assess body composition?

    <p>To assess the distribution of fat in the body (B)</p> Signup and view all the answers

    What is the term for excess energy intake leading to a gain in body weight?

    <p>Energy Surplus (D)</p> Signup and view all the answers

    What are the keys to a healthy lifestyle and body composition?

    <p>Balanced Diet, Regular Exercise, Adequate Sleep (B)</p> Signup and view all the answers

    What are the two types of adipose tissue?

    <p>Subcutaneous and Visceral (C)</p> Signup and view all the answers

    What is one of the negative health effects of excess body fat?

    <p>Increased risk of type 2 diabetes (D)</p> Signup and view all the answers

    What is the primary function of adipose tissue?

    <p>To store energy (D)</p> Signup and view all the answers

    What is one way that obesity can negatively affect mental health?

    <p>Increased risk of depression (C)</p> Signup and view all the answers

    What type of adipose tissue is associated with a higher risk of chronic diseases?

    <p>Visceral Adipose Tissue (A)</p> Signup and view all the answers

    Which of the following is NOT a common technique for assessing body composition?

    <p>Blood Pressure Monitoring (A)</p> Signup and view all the answers

    What is the difference between direct and indirect methods of assessing body composition?

    <p>Direct methods are invasive, while indirect methods are noninvasive (B)</p> Signup and view all the answers

    What are the main factors that contribute to an individual's body size?

    <p>All of the above (D)</p> Signup and view all the answers

    What are the three major structural components of the human body?

    <p>Muscle, Skeleton (bone), and Fat (C)</p> Signup and view all the answers

    What is the primary composition of Fat-free Mass?

    <p>Bone, vital organs, water, and connective tissue. (D)</p> Signup and view all the answers

    What does the "Two-component model" refer to in the context of body composition?

    <p>The amount of fat and fat-free mass in the body (B)</p> Signup and view all the answers

    What are the two major factors that influence the distribution of the three major structural components of the human body?

    <p>Genetics and Lifestyle (D)</p> Signup and view all the answers

    What does anthropometry involve?

    <p>Quantitatively measuring body size and proportions (C)</p> Signup and view all the answers

    What is one reason why assessing body composition is important?

    <p>To monitor changes in body composition associated with growth, maturation, and aging. (A)</p> Signup and view all the answers

    Why is knowledge of bone mineral content important in women and children?

    <p>It is important to prevent skeletal fragility in elderly women. (C)</p> Signup and view all the answers

    What are the key factors contributing to a healthy body composition?

    <p>Proper nutrition and regular exercise (A)</p> Signup and view all the answers

    What does "NEAT" stand for in the context of obesity and physical activity?

    <p>Non-Exercise Activity Thermogenesis (B)</p> Signup and view all the answers

    According to the Participaction data, what percentage of Canadian children achieve the recommended daily physical activity?

    <p>5% (C)</p> Signup and view all the answers

    Which of the following is NOT a factor contributing to the increased calorie consumption that contributes to the obesity epidemic?

    <p>Increased intake of whole grains and lean protein sources (A)</p> Signup and view all the answers

    Which of the following is a component of the "Individual Psychology" aspect of interrelated causes of obesity?

    <p>Self-esteem (B)</p> Signup and view all the answers

    Which of the following is a factor that contributes to the "Food Production" related to obesity?

    <p>Profitability and cost minimization in food production (B)</p> Signup and view all the answers

    How much longer do obese participants sit per day compared to lean participants?

    <p>164 minutes (A)</p> Signup and view all the answers

    What is the term for the energy expended by physical activities other than planned exercise?

    <p>Non-Exercise Activity Thermogenesis (B)</p> Signup and view all the answers

    Which of the following is NOT one of the eight main sections included in the "Anthropometry and Body Composition" chapter?

    <p>Calorie Counting and Weight Management (B)</p> Signup and view all the answers

    Which of the following is TRUE regarding age-adjusted percent fat prediction equations?

    <p>They are necessary because the same skinfold score can reflect different total percentage of body fat at different ages. (A)</p> Signup and view all the answers

    What is the primary function of the O-Scale System?

    <p>To provide a comprehensive physique assessment for health and fitness professionals. (A)</p> Signup and view all the answers

    Which of the following factors contribute to the higher electrical impedance in adipose tissue compared to muscle and bone?

    <p>Adipose tissue has a lower water content. (D)</p> Signup and view all the answers

    What is the primary difference between an adiposity-dominant physique and a weight-dominant physique using the O-Scale System?

    <p>Adiposity-dominant physique has higher A ratings, while weight-dominant physique has higher W ratings. (B)</p> Signup and view all the answers

    Which of the following is a potential limitation of using skinfold measurements to predict body fat percentage?

    <p>It has an inherent error of approximately 3-4%. (B)</p> Signup and view all the answers

    Which of the following statements accurately describes the "CSEP-PATH Body Composition Assessment" procedure?

    <p>It first determines if a subject is overweight or obese using a BMI calculation. (A)</p> Signup and view all the answers

    What is the primary purpose of using bioelectrical impedance analysis (BIA) to assess body composition?

    <p>To measure the resistance to the flow of electricity in the body. (B)</p> Signup and view all the answers

    Why is it crucial to use caution when applying general body composition equations to unique populations like extremely obese individuals or professional football players?

    <p>These populations may have different body fat distribution patterns and muscle mass ratios. (A)</p> Signup and view all the answers

    Which of the following assumptions is NOT made by the Siri equation for calculating percent fat?

    <p>There is a linear relationship between BMI and body fat percentage across all ethnic groups. (C)</p> Signup and view all the answers

    Why is hydrostatic weighing considered the 'gold standard' for measuring body composition?

    <p>It has been used to validate other methods of body composition assessment. (C)</p> Signup and view all the answers

    What is the main criticism of using the density of the nonfat compartment as 1.10 g/ml for all individuals?

    <p>The density of the nonfat compartment varies based on factors like age, sex, and ethnicity. (C)</p> Signup and view all the answers

    What is the primary concern with using BMI as a measure of obesity?

    <p>BMI does not account for muscle mass, which can influence weight. (B)</p> Signup and view all the answers

    What does the evidence suggest about applying the standard BMI cutoff points to Asian populations?

    <p>The standard BMI cutoff points should be significantly adjusted for Asian populations. (C)</p> Signup and view all the answers

    What is the primary assumption of BMI guidelines that is questioned by the text?

    <p>BMI is a reliable indicator of body composition. (B)</p> Signup and view all the answers

    What is the concern related to visceral fat as highlighted in the text regarding Asian populations?

    <p>Visceral fat is more directly associated with chronic diseases in Asian populations. (C)</p> Signup and view all the answers

    Based on the content, what conclusion can be drawn about the use of BMI as a universal measure of obesity?

    <p>BMI should be used cautiously and in conjunction with other measures of body composition. (A)</p> Signup and view all the answers

    Flashcards

    Body Composition

    The various elements and tissues that make up the human body.

    Anthropometry

    The study and measurement of human body dimensions and composition.

    Chemical Model of Body Composition

    Describes body composition in terms of fat, protein, carbohydrates, minerals, and water.

    Tissue Types

    The human body consists of four main tissue types: Nervous, Epithelial, Muscle, and Connective.

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    Energy Surplus

    A condition where calorie intake exceeds calorie expenditure, leading to weight gain.

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    Energy Deficit

    A condition where calorie intake is less than calorie expenditure, leading to weight loss.

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    Obesity

    A medical condition characterized by excessive body fat, impacting health.

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    Determinants of Body Size

    Factors that influence body size, including genetics, environment, and lifestyle choices.

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    Connective Tissue

    Tissues that work together to form organs in the body.

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    Fat-Free Mass

    Composition of the body excluding fat, including bone, muscle, and organs.

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    Health Association

    A higher lean mass and lower fat mass signify better health outcomes.

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    Osteoporosis Risk

    Low bone mass in youth can lead to frailty in elderly women.

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    Body Composition Assessment

    Monitoring changes in body composition during growth and aging is essential.

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    Key Components of Healthy Body Composition

    Nutrition, exercise, and optimal body fat to maintain health.

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    Chronic Diseases

    Diseases that develop slowly and last a long time, affecting overall health.

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    Adipose Tissue

    Fat tissue that functions as an endocrine organ, affecting physiology.

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    Visceral Adipose Tissue

    Fat located within the abdominal cavity, around internal organs, associated with higher health risks.

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    Subcutaneous Adipose Tissue

    Fat located just beneath the skin, less harmful than visceral fat.

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    Leptin

    A hormone secreted by fat cells that helps regulate energy balance and appetite.

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    Indirect Methods of Assessing Body Composition

    Noninvasive techniques used to estimate the body's composition.

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    Skinfold Measurements

    Method to estimate body fat using skinfold thickness at various sites.

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    Age-Adjusted Body Fat

    Equations that account for age in estimating body fat percentages.

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    Error in Skinfold Predictions

    Estimates using skinfold measurements have about a 3-4% error margin.

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    CSEP-PATH Assessment

    A body composition assessment method that includes BMI and waist measurements.

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    O-Scale System

    A physique assessment using height, weight, and skinfolds to evaluate body fat and muscle development.

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    Stanine Scale

    A nine-point scale used to compare adiposity and weight ratings.

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    Bioelectrical Impedance Analysis

    A method measuring body composition through the resistance of electrical flow.

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    Adiposity vs. Weight Dominant

    Adiposity dominant physiques have higher fat ratings, while weight dominant physiques have higher muscle ratings.

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    Siri Equation

    A formula to calculate body fat percentage using density measures.

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    Body Density Constants

    Fat density is 0.90 g/ml and nonfat density is 1.10 g/ml.

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    Hydrostatic Weighing

    A historical method for measuring body composition, considered the gold standard.

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    BMI Calculation

    Body Mass Index is calculated by weight (kg) divided by height (m) squared.

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    BMI Classifications

    Underweight: < 18.5, Normal: 18.5-24.9, Overweight: 25-29.9, Obese: ≥ 30.

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    BMI and Ethnicity

    BMI cut-off points may vary across different ethnic groups due to body composition differences.

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    Visceral Fat

    Fat located around internal organs, posing a health risk.

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    Criticism of BMI

    BMI does not differentiate between muscle and fat, leading to inaccuracies.

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    Interrelated Causes of Obesity

    Factors contributing to obesity including social, individual, and environmental elements.

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    NEAT

    Non-exercise activity thermogenesis; energy expended from non-planned exercise activities.

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    Screen Time in Children

    Canadian children average over 7 hours of screen time daily, affecting physical activity.

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    Physical Activity Recommendations

    Only 5% of Canadian children meet the daily recommendation of 50 minutes of activity.

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    High Calorie Diets

    Diets rich in processed foods high in sugar and fat leading to obesity.

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    Children's National Campaign

    The 'Make Room for Play' initiative encourages less screen time and more physical play.

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    Sedentary Behaviour

    A lifestyle characterized by prolonged periods of inactivity, linked to obesity risk.

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    Genetic Factors in Obesity

    Genetics and epigenetics play a role in appetite control and body weight.

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    Study Notes

    Introduction to Biomedical Physiology and Kinesiology

    • This course introduces biomedical physiology and kinesiology.
    • The image shows a human figure with a skeleton overlaid.

    Anthropometry and Body Composition

    • The slides show data for waist circumference, visceral adipose tissue, and thigh subcutaneous adipose tissue for 60 and 80-year-old males.
    • Learning outcomes involve explaining the assumptions and limitations of human body composition measurement, and correlations between body composition and health.
    • Learning goals involve building knowledge of human body composition, connecting body composition to health and athletic performance, and developing empathy for obesity prevalence in society.
    • Key learning outcomes include defining body composition models, anthropometry, essential and storage fat (males & females), and describing obesity's health effects.
    • Assumptions and limitations of common human body composition measurements are to be described.
    • The interrelated determinants of body size and the prevalence of obesity will be described.
    • The keys to a healthy lifestyle and body composition will be discussed.

    Body Composition - Structure and models

    • The human body is composed of many elements, with oxygen the most plentiful.
    • The main elements include oxygen, carbon, hydrogen, nitrogen, etc.
    • A chemical model of body composition includes fat, protein, carbohydrate, mineral and water
    • Tissue types include nervous, epithelial, muscle and connective tissue.
    • The human body has three structural components - muscle, skeleton, and fat.
    • Body components vary based on gender.
    • The two-component model describes the amount of fat and fat-free mass in the body.
    • Fat-free mass primarily includes bone, muscle, water, vital organs, and connective tissue.

    Why Assess Body Composition

    • Knowledge of bone mineral content in women and children is critical for preventing osteoporosis.
    • Monitoring body composition changes with growth, maturation, and aging is important for diagnosing disease.
    • Changes associated with aging in developed countries often include increased fat mass, decreased muscle mass, and decreased bone mass.
    • Healthy body composition is for health and performance goals in various sports and improving weight management/strength training.
    • Assessing body composition is important for assessing health (obesity, chronic diseases, and low levels of fat/muscle).
    • Sarcopenia (very low muscle mass) is a potential risk factor from aging.
    • Activity can maintain muscle mass and healthy body composition.

    Common Techniques for Assessing Body Composition

    • Direct methods involve chemical analysis of human cadavers
    • Indirect methods are non-invasive techniques used on living people.
    • Techniques include: Height-Weight Tables, Body Density/Volume Measurements, Weight-Height Indices, Waist Circumference, Skinfold Measurements,CSEP-PATH Body Composition Assessment, O-Scale System, Bioelectrical Impedance Analysis, and Other Procedures (e.g., DEXA, CT, MRI).

    BMI and Body Composition

    • Body Mass Index (BMI) is a measure of body obesity, calculated by dividing weight (kg) by height (meters) squared.
    • BMI classification standards for adults (20-70 years old) are provided, along with corresponding health risks.
    • BMI is not always an accurate predictor of body composition. This is especially true for individuals with high proportions of muscle versus fat, or those with differing ethnic backgrounds.
    • There are some criticisms of using BMI: it does not consider body composition, data is often from specific populations, and determining frame size is problematic.

    Waist Circumference

    • Waist circumference is an inexpensive and effective measure of central obesity. It strongly correlates with abdominal imaging and is associated with cardiovascular disease (CVD) risk.
    • Waist circumference and waist-to-hip ratio are often better predictors of obesity-related health risks than BMI.

    Skinfold Measurements

    • Skinfold measurements are used to assess body fat.
    • A 20% or more body fat percentage for men, or 30% or more for women, may be considered obese.
    • Two primary ways to use fat folds are comparing differences in individuals across time and to use the summed measurements as an indication of relative fatness.
    • Skinfold measurements are site-and sample-specific.
    • Issues with measurement techniques may contribute to errors.

    CSEP-PATH Body Composition Assessment

    • This procedure uses BMI to first determine if a person is overweight or obese and then uses waist circumference to determine if abdominal fat is present.

    Other Assessment Procedures

    • Dual Energy X-ray Absorptiometry (DEXA) uses low-dose X-rays to measure bone mineral density and body composition.
    • Computerized Tomography (CT) provides detailed images but the radiation dose is high.
    • Magnetic Resonance Imaging (MRI) produces detailed images without using radiation.

    Obesity and Energy Intake

    • Trends in obesity, obesity related diagnoses and caloric density have increased significantly over time.
    • Several factors, such as societal changes and increased consumption patterns, have contributed significantly to the rising obesity rate across populations.
    • There is a relationship between body mass index and mortality risk.
    • Data from 1981 to 2009 indicates a decline in the fitness levels of Canadian populations.

    Determinant of Body Composition

    • Genetics play a significant role in body size and proportions.
    • Overfeeding studies and genetic studies support a role for genetics in impacting weight gain, but not wholly responsible for obesity.
    • Many genetic sites associated with appetite regulation influence obesity risk..

    Interrelated Causes of Obesity

    • Factors such as social psychology, individual psychology, physical activity environment, and physiology are all interrelated and contribute to obesity.
    • Social psychology includes media, peer pressure, food advertising. Individual psychology factors include self-esteem and stress. Physical activity environment factors include occupation and availability of transportation. Related physiological factors include genetics, epigenetics, appetite control, and food consumption. Food production includes affordability, portion size, energy density and availability of convenience foods.
    • NEAT (non-exercise activity thermogenesis) is the energy expended through non-planned activities including sitting, standing, walking, fidgeting etc.

    Participation

    • Participation rates for physical activity are low in many regions.
    • Children now spend more time using devices than their parents spent at work.

    Keys to Healthy Body Composition

    • A person's best weight involves a lifestyle that supports health and well-being.
    • Losing fat often requires maintaining a calorie deficit through reduced caloric intake and/or increased energy expenditure.
    • It is essential to maintain a healthy lifestyle rather than a quick-fix approach.
    • A well-planned diet rich in varied nutrients is ideal, alongside regular exercise and time outdoors, which often include self-care and sleep.

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    Description

    Test your knowledge on the four main tissue types that compose the human body and various aspects of body composition. This quiz covers key factors contributing to obesity, methods of assessment, and the roles of different types of fat in health. Challenge yourself and learn about the importance of maintaining a healthy lifestyle!

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