8730066
Descrição
Questão 1
Questão
Which statement about skeletal muscle cells in false?
Responda
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They can be up to 40cm in length.
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They are striated due to protein arrangement.
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They are cylindrical and aligned in parallel.
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They can have multiple nuclei.
Questão 2
Questão
Myosin is the thin myofilament, and actin is the thick myofilament.
Responda
- True
- False
Questão 3
Questão
A sarcomere is 2 two micrometres from Z-disk to Z-disk.
Responda
- True
- False
Questão 4
Questão
Choose the statement that is false.
Responda
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Longer muscle fibres means a smaller ROM.
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Muscle fibres can shorten up to 50% in length when contracting.
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Pennate/oblique muscle fibres have a larger physiological cross sectional area but not a longer anatomical cross sectional area.
Questão 5
Questão
Fibre Type I has [blank_start]high[blank_end] enzymatic/metabolic activity and is [blank_start]aerobic[blank_end]. It is slow twitching. Marathon runners may have more of this type.
Fibre Type II has [blank_start]low[blank_end] enzymatic/metabolic activity and is [blank_start]anaerobic[blank_end]. It is fast twitching. Usain bolt probably has a lot of this type.
Responda
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high
-
aerobic
-
low
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anaerobic
Questão 6
Questão
Fitting more fibres into the same space e.g. a pennate arrangement reduces the shortening ability of muscle but increases forces exerted by muscle.
Responda
- True
- False
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