B9 - Respiration Flashcards

1
Q

Cellular respiration?

A

Exothermic reaction that occurs continuously in living cells

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2
Q

Word equation for aerobic respiration?

A

Glucose + oxygen –> carbon dioxide + water

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3
Q

What do you muscles store glucose as?

A

Glycogen

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4
Q

During exercise..?

A
  • Glycogen stores in the muscles are converted to glucose for cellular respiration.
  • Increase in heart rate, breathing rate and breathing volume
  • Flow of oxygenated blood to muscles increases
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5
Q

Define anaerobic respiration?

A

Respiration without oxygen.

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6
Q

What is glucose broken down into in anaerobic respiration during exercice in humans?

A

Lactic acid

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7
Q

After working for a long time, muscles….

A

Become fatigued and don’t contract efficiently. If oxygen is limited, anaerobic respiration occurs

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8
Q

Define oxygen debt?

A

The extra oxygen that must be taken into the body after exercise has stopped to complete the breakdown of lactic acid.

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9
Q

What does metabolism include?

A
  • Conversion of glucose into starch
  • Glycogen used to make cellulose
  • Formation of lipid molecules
  • Use of glucose and nitrate ions to make amino acids (used in protein synthesis and the break down of excess proteins into urea)
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10
Q

Where is lactic acid converted into glucose?

A

The liver

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