Respiration: Practice Questions

In the context of metabolism, which of the following molecules is formed by combining one molecule of glycerol with three molecules of fatty acids?

After a period of intense exercise, a student's heart rate remains high for several minutes. Which biological process explains why this extra oxygen is needed in the liver?

The chemical equation for anaerobic respiration in yeast is essential for the food industry. Which of the following correctly identifies the products of this reaction?

What is the chemical product of anaerobic respiration in human muscle cells?

During exercise, the body develops an oxygen debt. Which statement best describes the fate of lactic acid during the recovery period (Higher Tier only)?

In anaerobic respiration, glucose is not fully oxidized. What is the specific chemical product of anaerobic respiration in yeast cells?

A student monitors their physiological changes during a period of vigorous exercise. Explain two reasons why the breathing rate increases during this activity.

During vigorous exercise, the human body undergoes several physiological changes to meet the increased demand for energy.

a) Explain why the incomplete oxidation of glucose during anaerobic respiration results in muscle fatigue.
b) Describe the process of metabolism and list two examples of metabolic reactions that occur in the human body.
c) A student measures their heart rate before and after a 10-minute run. Explain why it is important for the heart rate to remain high for a period of time after the exercise has stopped.