Anaerobic Respiration in Animals Flashcards

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What is anaerobic respiration in animals?

It is respiration that does not use oxygen to release energy from glucose.

When are animal muscle cells most likely to carry out anaerobic respiration?

During hard exercise, when they cannot get enough oxygen.

What is the word equation for anaerobic respiration in animal cells?

Glucose → lactic acid. Energy is released.

Compared with aerobic respiration, how much energy does anaerobic respiration release from each glucose molecule, and why?

It releases less energy because the glucose is not fully broken down and some energy stays in the lactic acid.

What substance builds up in muscles during anaerobic respiration, and what effect can it have?

Lactic acid builds up. It can cause muscle pain and tiredness.

What is meant by oxygen debt?

It is the extra oxygen the body needs after exercise to break down lactic acid and return to normal.

Why do you keep breathing fast and have a high heart rate after hard exercise?

To bring in more oxygen and send it to the muscles, so the oxygen debt is paid and lactic acid is removed.

What happens to lactic acid after exercise has finished?

It is carried in the blood to the liver, where it is broken down.

Why can animals only rely on anaerobic respiration for a short time?

Because lactic acid builds up, which is harmful and makes muscles stop working well.