Exercise Physiology and Enzyme Activity

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What is the primary fuel source for the body during exercise?

Carbohydrates (correct)

Vitamins

Fat

Protein

What is the role of lactic acid in the body during exercise?

Lactic acid is a byproduct of aerobic respiration

Lactic acid helps to increase enzyme activity

Lactic acid is produced during anaerobic metabolism and can lead to muscle fatigue (correct)

Lactic acid helps to regulate body temperature

How does exercise affect body temperature?

Exercise only affects body temperature in hot or cold environments

Exercise decreases body temperature

Exercise increases body temperature through the generation of heat (correct)

Exercise has no effect on body temperature

What is the relationship between enzyme activity and exercise?

Exercise increases enzyme activity to support energy production Signup and view all the answers

What is the role of carbohydrates in energy production during exercise?

Carbohydrates are the primary fuel source for aerobic exercise Signup and view all the answers

How does exercise affect pH levels in the body?

Exercise decreases pH, making the body more acidic due to lactic acid production Signup and view all the answers

What are the primary nutrients used for energy during exercise?

Fats and carbohydrates Signup and view all the answers

How does a small rise in body temperature affect enzyme activity?

Increases enzyme activity Signup and view all the answers

What is the effect of lactic acid accumulation on pH during exercise?

Decreases pH Signup and view all the answers

Which of the following is not a form of carbohydrates?

Proteins Signup and view all the answers

What is the composition of carbohydrates?

Carbon, hydrogen, and oxygen Signup and view all the answers

Why is a decrease in body fluid pH problematic during exercise?

Decreases ability to provide ATP for muscular contraction Signup and view all the answers

Which of the following is true about protein as a fuel source during exercise?

Protein use for energy is highest when exercising in a glycogen-depleted state. Signup and view all the answers

What is the recommended protein intake for athletes who train intensely for 2 to 6 hours daily?

1.2 to 1.8 g of protein per kg of body mass daily Signup and view all the answers

Which of the following vitamins play a key role in regulating energy-yielding reactions during exercise?

Water-soluble B-complex vitamins Signup and view all the answers

What is the main challenge posed by prolonged, hot weather exercise?

Dehydration and electrolyte imbalance Signup and view all the answers

How does a high-carbohydrate diet with adequate energy intake affect muscle protein in athletes who train hard and for protracted durations?

It preserves muscle protein. Signup and view all the answers

What is the recommended daily protein intake for physically active men and women?

1.2 to 1.8 g of protein per kg of body mass Signup and view all the answers