Nutrition - Lecture 8

What is the measure of chemical energy in foods commonly referred to as?

Kilocalories (Kcals) or 'calories'

What are the main sources of energy for the body?

Carbohydrates, protein, fat, and alcohol

How is food energy content typically measured?

Using a bomb calorimeter

What does Total Energy Expenditure (TEE) include?

The sum of all energy-requiring processes plus activity

What components contribute to Total Energy Expenditure?

Basal metabolic rate, thermic effect of food, and physical activity

What is Basal Metabolic Rate (BMR)?

Energy required for vital functions in the body at rest

What factors can affect Basal Metabolic Rate?

Body size, fat-free body mass, gender, and age

What is the thermic effect of food?

The metabolic cost of digestion, metabolism, and storage of nutrients

What is Non-Exercise Activity Thermogenesis (NEAT)?

Activities involving muscle contraction that are not formal exercise

What is the relationship defined by energy balance?

The relationship between energy intake and energy output (expenditure)

What is the common predictive equation used for calculating energy needs?

Harris-Benedict or Mifflin-St Jeor equations

What does a positive energy balance indicate?

More energy intake than energy expenditure

How many kilocalories are equivalent to 1 pound of body fat?

3,500 kilocalories

If a client wants to lose 1 lb/week, how many kcals/day should they reduce their intake?

500 kcals/day

What is the effect of high rates of obesity on energy balance?

It complicates the relationship between energy in and energy out

What are some factors that affect satiety and metabolism?

Biology (genetics & hormones), socioeconomic status, psychology, knowledge, and emotions

What is the significance of calculating weight loss in terms of kilocalories?

It helps determine daily caloric intake reductions needed for weight loss

What is the role of clinical settings in measuring energy needs?

Using indirect calorimetry to calculate energy expenditure by measuring respiratory gases

What challenges do infants and children face regarding energy expenditure?

Higher surface area-to-weight ratio leading to increased energy expenditure

What is the impact of environmental temperature on BMR?

BMR can be higher in cold environments due to increased energy expenditure for thermoregulation

What is the importance of proper technique in indirect calorimetry?

It ensures accuracy in measuring energy expenditure

What is the relationship between physical activity and energy expenditure?

Physical activity is a significant component of Total Energy Expenditure