Force recap Flashcards
What is force generated by?
Contraction of muscle
What is unique about muscle?
Only tissue in the body that can generate force
Explain the parts of the muscle structure
Muscle is made up of fasicles, which contain which contains fibres, which contain myofibrils which contains sarcomeres
What happens at the sarcomeres?
Binding of myosin heads and actin
What is the myosin and actin binding known as
Sliding filament
What are sarcomeres?
Unit that causes contraction
Explain the length tension relationship
The more myosin and actin we have connected together the more force we can generate
The amount of force generated from sacromere is dependent on what?
Number of connected myosin heads
What happens if the sacromere is too short?
No movement is possible so cant generate any force
What happens if the sarcomere is too long?
Actin and myosin cant bind so no force is generated
Explain the idea “Force is generated by active shortening of sacromeres as needed
We dont need to use all our actin and myosin at the same time
List 2 attributes of pennated muscle
Angled
Lots fo fibres packed in
Explain use/storage of muscle fibres in a heavy load vs a light load
When lifting a heavy load, more muscle fibres are required meaning that its harder for us to do to quickly and we have no muscle fibrees in reserve whereas when lifting a light load it requires less muscle fibres so we are able to do it much easier and quicker and we have lots of muscle fibres in reserve
Explain why it takes longer to lift a heavy load vs a light load
Connecting cross bridges takes time to bind
When muscle is lengthened is it easy or hard to move?
Hard
