Week 11 Practice Quiz

When energy in equals energy out body weight will ______.

remain the same

The muscles of a professional marathon runner are most likely to have ________.

20 percent fast-twitch muscle fibers and 80 percent slow-twitched muscle fibers

How many calories per gram do each of the following molecules yield ? a) carbohydrates

4 calories per gram

How many calories per gram do each of the following molecules yield ? c) proteins

4 calories per gram

How many calories per gram do each of the following molecules yield ? d) alcohol

7 calories per gram

The muscles of a professional sprinter are most likely to have _______.

80 percent fast-twitched muscle fibers and 20 percent slow-twitch muscle fibers

How many calories per gram do each of the following molecules yield ? b) fats

9 calories per gram

Which of the following is the best definition of basal metabolic rate (BMR) ?

A measure of the rate at which a person's body burns calories while at rest

Michelle has been tracking her food intake and physical activity for the past three months. She has found that she is taking in about 1800 calories per day in food and beverages. What do you predict will happen to her body weight ?

Her weight will stay the same.

Imagine you go to the gym for a workout. You decide to warm up on the treadmill. a) How would your demands for energy change when you are exercising ?

Increase

Imagine you go to the gym for a workout. You decide to warm up on the treadmill. b) How would your breathing rate change when you are exercising ?

Increase

What would happen to each of the following as your metabolism increases ? a) oxygen intake

Increase

What would happen to each of the following as your metabolism increases ? b) carbon dioxide output

Increase

What would happen to each of the following as your metabolism increases ? c) heat production

Increase

Why do you get hot and sweat with increased physical activity ?

Cellular respiration produces heat

What are the four sources of energy in the human diet ?

Protein, Carbohydrates, Alcohol and Fats

Maria eats 2500 calories per day and estimates that she burns about 2000 calories per day. How will her energy balance affect her body weight ?

She will gain weight

Which of the following is the best definition of energy homeostasis ?

The balance of calories is consumed compared to calories burned.

How is the amount of energy in food and beverages measured ?

The energy in food and beverages is measured in calories.

What is the best definition of the thermic effect of food ?

The energy needed by the digestive system to process food for use or storage

Which of the following would be the best way to measure basal metabolic rate ?

amount of CO2 exhaled

Fast muscle fibers would be expected ________.

contain fewer mitochondria and tire easily.

ATP used by fast muscle fibers primarily produced in the ________ and the ATP used by slow muscle fibers is primarily produced in the ________.

cytoplasm ; mitochondria