Activity thermogenesis refers to the changes in metabolism when:

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Question restatement: Activity thermogenesis refers to the changes in metabolism when:

Option 1: 'we exercise or play sports' — This is a clear example of activity thermogenesis, since physical activities increase energy expenditure and metabolic rate beyond resting levels.

Option 2: 'All of the above are examples of activity thermogenesis because they all add to the body's energy requirements.' — This option claims that all listed activities contribute to energy expenditure, which aligns with the concept that any intentional physical activity or movement raises metabolic rate and uses energy beyond basal metabolism.

Option 3: 'we lift weights or go to the gym' — Weightlifting and gym workouts are forms of physical activity that elevate energy use and caloric burn, so they fit activity thermogenesis.

Option 4: 'we do work around the house like gardening and vacuuming.' — Domestic chores involve movement and exert energy, thereby increasing metabolism and fitting the definition of activity thermogenesis.

Reasoning about each option:
- For options 1, 3, and 4: Each describes a concrete form of physical activity or movement that raises energy expenditure above resting levels, which is precisely what activity thermogenesis describes. These are valid contributions to the body's energy requirements during active behavior.
- For option 2: This option asserts that all the listed activities are examples of activity thermogenesis and collectively contribute to total energy expenditure. Since each activity (exercise, lifting weights, and household chores) individually increases energy use, the aggregate statement correctly captures the concept that activity thermogenesis encompasses a range of movements and activities that add to energy requirements.

Potential misconceptions addressed:
- If someone thought only intentional workouts count, they would miss that everyday movements like gardening or vacuuming also raise energy expenditure, which is included under activity thermogenesis.
- If someone claimed that activity thermogenesis is limited to exercising in a gym, they would overlook the broader scope that includes any physical activity beyond resting metabolism.

In summary, the concept is that any purposeful movement or physical activity increases metabolic rate beyond rest, and the option stating that all listed activities contribute to energy requirements accurately reflects that idea.

EDGU1003 (ND) Week 6 - Test your understanding

Activity thermogenesis refers to the changes in metabolism when:

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