Anaerobic Respiration in Muscles Flashcards

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What does anaerobic respiration in muscles mean?

It is respiration in muscle cells that happens without oxygen during very hard exercise.

What is the word equation for anaerobic respiration in human muscle cells?

Glucose → lactic acid (+ energy released).

When are muscle cells most likely to respire anaerobically?

During very hard or fast exercise, when the blood cannot bring enough oxygen to the muscles.

Why does anaerobic respiration release less energy per glucose than aerobic respiration?

Because the glucose is only partly broken down, so less energy is released.

What effect does lactic acid have on muscles?

Lactic acid builds up in muscles and can cause pain and muscle fatigue.

What is oxygen debt?

Oxygen debt is the extra oxygen your body needs after exercise to break down lactic acid and remove it.

Why do breathing rate and heart rate stay high after intense exercise?

They stay high to bring extra oxygen to the muscles and liver so lactic acid can be broken down and oxygen debt can be repaid.

How is lactic acid removed from the body after exercise?

Lactic acid is carried in the blood to the liver, where it is broken down using oxygen.

What is one advantage of anaerobic respiration in muscles?

It allows muscles to keep working and releasing energy for a short time when there is not enough oxygen.

What is one disadvantage of anaerobic respiration in muscles?

It releases less energy per glucose and causes lactic acid to build up, which can stop muscles working well.