U1: 8- Energy Systems In Muscle Cells Flashcards
During strenuous exercise what type of respiration does the body carry out?
Lactate metabolism
Which two stages of respiration do not occur because of a lack of oxygen?
Citric acid cycle and electron transport chain
How many ATPs are made during lactate metabolism?
2ATPs
During lactate metabolism what does the pyruvate get turned into after glycolysis?
Lactic acid (lactate)
What debt is said to have built up during lactate metabolism?
Oxygen debt
When is the oxygen debt built up during lactate metabolism paid back?
During the recovery period
What substance is reformed following the oxygen debt being repaid?
Pyruvate
Name the two types of skeletal muscle fibre.
slow-twitch muscle fibres and fast-twitch muscle fibres
Which type of fibre is used during endurance events like a long distance run or cycle?
Slow-twitch muscle fibres
Which type of fibre is used during power events such as a sprint or weightlifting?
Fast-twitch muscle fibres
Name the oxygen storing protein present in muscle cells.
Myoglobin
Which oxygen storing protein has a higher affinity for oxygen, haemoglobin or myoglobin?
Myoglobin
Which type of muscle fibre contains many mitochondria, tire slowly, contract over a long period of time and have lots of blood capillaries and myoglobin?
Slow-twitch muscle fibres
Which type of muscle fibre contains low numbers of mitochondria, tire easily, contract quickly and have low levels of blood capillaries and myoglobin?
Fast-twitch muscle fibres
What is the major storage fuel used by fast twitch muscle fibres?
Glycogen
