Body Composition and Energy Balance

The video tutorial covers energy balance and body composition, focusing on positive and negative energy balance and their effects on weight. It explains energy intake and expenditure, including basal metabolic rate, physical activity, and the thermic effect of food. The tutorial also discusses body composition, methods to measure it, and the implications of fat distribution on health.

What is the effect of a positive energy balance on body weight?

• Weight loss

• No change in weight

• Weight gain

• Weight maintenance

How many calories are approximately equivalent to a pound of fat?

• 4500 calories

• 3500 calories

• 2500 calories

• 1500 calories

Why is the human body less efficient than a bomb calorimeter at burning food?

• The body does not digest and absorb all nutrients completely

• The body is more efficient than a bomb calorimeter

• The body uses nitrogen as a source of energy

• The body absorbs all nutrients completely

Which component of energy expenditure accounts for the majority of calories burned in a sedentary person?

• Voluntary muscle movement

• Thermic effect of food

• Basal metabolic rate

• Physical activity

What factor does NOT affect basal metabolic rate?

• Age

• Gender

• Surface area

• Height

What is the thermic effect of food?

• Energy required for voluntary muscle movement

• Energy required for basal metabolic rate

• Energy required for digestion and processing of food

• Energy required for physical activity

What percentage of body weight in a healthy person is typically lean body mass?

• 35%

• 25%

• 45%

• 55%

Which method is considered very accurate but expensive for determining body fat?

• BMI calculation

• Skin calipers

• Bioelectrical impedance

• Underwater weighing

What is a limitation of using BMI as a tool for assessing body composition?

• It is only applicable to athletes

• It is a complex calculation

• It measures body fat accurately

• It does not account for muscle mass

What shape is associated with a higher risk of disease due to fat distribution?

• Hourglass shape

• Rectangle shape

• Apple shape

• Pear shape