Metabolic Rate and Measurement Concepts

The video explores metabolic rate, the energy used by the body over time, measured in various units. It discusses methods to measure metabolic rate using respirometers and calorimeters, explaining how these devices work. The concept of basal metabolic rate is introduced, highlighting its importance when the body is at rest. The video compares metabolic rates of different animals, emphasizing that smaller animals have higher metabolic rates per unit of body mass due to surface area to volume ratios.

What is the primary function of metabolic rate in the body?

• To determine the energy used by the body over time

• To measure the amount of food consumed

• To calculate the body's water intake

• To assess the body's fat percentage

Which of the following is NOT a unit used to measure metabolic rate?

• Kilojoules

• Calories

• Joules

• Liters

What is a respirometer primarily used to measure?

• The water intake of an animal

• The oxygen consumption of an animal

• The carbon dioxide production of an animal

• The amount of food an animal eats

In a respirometer setup, what is the purpose of the control chamber?

• To increase the temperature

• To absorb carbon dioxide

• To absorb oxygen

• To represent the same mass as the test organism

What does a simple calorimeter measure in terms of metabolic rate?

• The heat produced by germinating seeds

• The water intake of an organism

• The amount of carbon dioxide produced

• The amount of oxygen consumed

How does a complex calorimeter differ from a simple one?

• It calculates the energy from food intake

• It measures carbon dioxide production

• It uses a sealed room and measures heat exchange with water

• It measures oxygen consumption

What is basal metabolic rate?

• The rate of food consumption

• The metabolic rate during exercise

• The metabolic rate when an animal is at rest

• The rate of water intake

Why do smaller animals have a higher metabolic rate per unit of body mass?

• They produce more carbon dioxide

• They have a larger surface area to volume ratio

• They have more fat

• They consume more food

Which animal would have a higher overall metabolic rate, an elephant or a mouse?

• It depends on the environment

• Elephant

• Mouse

• Both have the same

What is one reason smaller animals lose heat faster than larger ones?

• They have thicker fur

• They consume less oxygen

• They have a larger surface area to volume ratio

• They have a smaller surface area