Skeletal, Smooth and Cardiac Muscle Structure and Contraction Flashcards
Muscle fibre structures are…
- Striated
- Unbranched
- Multi-nucleated
The 3 different types of Muscle Fibres are…
- Type 1
- Type 11A
- Type 11
Contraction is….
Neurogenic
Type 1 Muscle Fibres are also called…
Slow Twitch
Slow Twitch (Type 1) features are….. (2)
- Very aerobic
- Low Fatigue (fibres can contract for a long period)
Slow Twitch (1) fibres are used in… (2)
- Postural Control
- Repetitive slow locomotion
e.g. Marathon Running
Type 11a Fibres are also called….
Fast Twitch (Oxidative) Fibres
Fast Twitch Fibres (11a) features are…. (3)
- Aerobic - somewhat resistant to fatigue
- Uses oxygen to convert glycogen to ATP (glycolysis)
- Oxidative
Fast Twitch fibres are used in….
Repetitive, fast locomotion
e.g. Sprinting
Type 11x Fibres are also called…
Fast-twitch (Glycolytic) Fibres
Fast-twitch (11x) Fibres features are… (2)
- Anaerobic - high power output, fatigue easily
- Rely on stored ATP to generate energy
Fast-twitch (11x) are used for…
- High output energy
e.g. Weightlifting
What are Slow twitch fibres microscopic features? (3)
- Smaller diameter
- Darker in colour (due to myoglobin)
- Numerous Mitochondria and capillaries (to produce ATP)
What are Fast twitch Fibres microscopic features? (3)
- Larger diameter
- Lighter in colour
- Less mitochondria (not needed as anaerobic)
Skeletal muscle are attached to bones by…
Tendons
What is the Skeletal Muscle Anatomy route from largest to smallest… : Myofibril, Fascicle, Muscle Fibre, Deep Fascia
Deep Fascia -> Fascicle -> Muscle Fibre -> Myofibril
Actin are _____ filaments
Thin
Myosin are ______ filaments
Thicker