Muscle Review Flashcards
What joins muscle to boneplp
Tendon
A muscle can only?
Contract
What joins bone to bone?
Ligament
Antagonist muscles are?
Muscles grouped to pull in opposite directions
A single muscle fibre is composed of many?
Myofibrils
What are the smallest functional group of muscle proteins that make up myofibrils?
Sarcomeres
Where are the smooth muscles located?
Blood vessels
Digestive track
Internal organs
Eyelids
When a sacomere contacts which protein slides?
Actin
Which element is essential for a muscle contraction?
Calcium
Which filament must be moved away from the binding sites before a muscle contraction can occur?
Tropomyosin
What protein structure is loaded with ATP in preparation for a muscle contraction?
The myosin head
What are the 3 types of muscle?
Smooth
Cardiac
Skeletal
Which type of muscle is branched, allowing for a coordinated and constantly strong muscle contraction?
Cardiac
A sprinter (100m) uses more fast twitch or slow twitch muscles?
Fast twitch
Why does a slow twitch muscle set allow for prolonged exercise?
Slow twitch muscles contain numerous mitochondria which produces long term energy. These require high levels of glucose and do not fatigue as easily
What is the “all or nothing” muscle response
A single myofibril will completely contract
Describe skeletal muscles
Are striated and tubular
Have many nuclei
Contract voluntarily
Describe smooth muscle
Non striated
Have one nucleus
Contract involuntarily
Found in walls or internal organs
Describe cardiac muscle
Are striated tubular and branched
Have one nucleus
Contract involuntarily
Are found in the walls of the heart
What is the hierarchy of muscle structure
Muscle Muscle fibre bundle Muscle fibre Myofibrils Myofilaments
