E1 Muscle types Flashcards
What is the skeletal muscle(known as striated/striped muscle) and why is it important?
(3 points)
Muscle is voluntary (under your conscious control)
Critical to sport and exercise due to skeletal system connected by tendons
Responsible for movement
Can fatigue during exercise
What is the cardiac muscle and why is it important? (5 points) Found in... Works... Contractions help... Does not...
Only found in the wall of the heart Works continuously No under conscious control (involuntary) Contractions help force blood through blood vessels to all parts of body Does not fatigue
What is the smooth muscle and why its important?
Location?
(3 points)
Involuntary muscle under control of the nervous system
In walls of digestive system and blood vessels
Helps regulate digestion and blood pressure
What is type I (slow-twitch) fibres?
Example of who it is suitable for?
(5 points)
Contract slowly with less force
Slow to fatigue
Suited to longer duration aerobic activities
Contain mitochondria to sustain aerobic metabolism
High capacity for aerobic respiration
What is type IIa fibres (fast-twitch or fast-oxidative fibres)?
(4 points)
Fast contracting, able to produce a great force
Resistant to fatigue
Less reliant on oxygen for energy supplied by blood
Fatigue faster than slow-twitch fibres
Type IIx(fast-twitch or fast-glycolytic fibres)? Example of who its suitable for? (4 points)
Contract rapidly, able to produce large amount of force Fatigue faster Suited to anaerobic activity Dependent on anaerobic respiration Recruited for higher-intensity
What is the fascicle do?
(Fascicle= to just one bundle)
(2 points)
Each fascicle is held together by a connective tissue known as perimysium
All fasciculi is held in place by a muscle known as epimysium
What does the epimusium do?
1 point
Protects the muscle from friction against other muscles and bones
