Muscles and Energy

What cells in the body may undergo lactic acid fermentation during exercise? 

• Muscle cells
• Fat cells
• Liver cells
• Skin cells

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Lactic acid fermentation occurs in your muscles after a workout because your cells are struggling to get

• Glucose
• Sunlight
• Oxygen
• Water

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NGSS.HS-LS2-3

Fermentation is cellular respiration without which molecule?

• CO₂
• O₂
• C₆H₁₂O₆

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After intense activity, your muscles feel sore because of 

• the accumulation of NAD+
• the accumulation of lactic acid 
• the accumulation of ATP
• the accumulation of carbon dioxide

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What are the characteristics of fast twitch muscle fibres?

• Explosive activities, fatigue slowly
• Endurance activities, fatigue slowly
• Explosive activities, fatigue quickly
• Endurance activities, fatigue quickly

Which one of the following is a key characteristic of slow twitch muscle fibers? 

• They contain large amounts of Mitochondria
• They are fast to fatigue
• They are recruited last
• They contain low numbers of Mitochondria

Fast twitch muscle fibres

• produce more force and have large amounts of mitochondria

• produce less force and have large amounts of mitochondria

• produce more force and have low amounts of mitochondria

• produce less force and have low amounts of mitochondria

Fast twitch muscle fibres can continue to contract for long periods of time.

• True

• False

Muscle fibres which use oxygen well are

• slow twitch

• fast twitch

• full twitch

What does the term oxygen debt mean?

• A temporary shortage of oxygen in muscle tissues due to vigorous exercise.

• Prolonged oxygen deprivation leading to muscle tissue damage

• The estimated deficit of oxygen at the beginning of an exercise session