Download Muscles - Hinchingbrooke

Muscles
GCSE PE
Types of muscle
• Cardiac
• Involuntary
• Voluntary
Voluntary muscle
Cardiac muscle
Muscle types
Cardiac
Involuntary
Voluntary
• Smooth muscle
• Found only in the heart
• Never fatigues
• Work automatically
• Smooth muscle
• Make up the organs,
blood vessels,
intestines
• Work automatically
• Striated muscle
• Attach to the skeleton
• Work under conscious
control
Structure of skeletal muscle
Muscle groups
Can you identify some of the major muscle groups on these drawings?
Now try the ‘Active Challenge’
at the bottom of page 133 in
Folens GCSE PE for Edexcel
Muscle table
Muscle
Location
Function
(where is it found?)
(what does it do?)
Choose two each from the arms, legs, back & front and any two others
Try to remember the names of the bones or joints underneath the muscles
Types of muscle fibre
• Fast twitch
– Contract quickly
– Tire easily
• Slow twitch
– Contract slowly
– Keep going for a
long time
Compare and contrast
Fast twitch
Slow twitch
1
1
2
2
3
3
4
4
Fill in what you can and then read page 136 in your text for more ideas
Muscles at work
• Muscles work in pairs
• Muscles attach to at
least two different
bones
• Muscles attach to
bones via tendons
• Muscles can only pull
• The end of the muscle
that is fixed is called
the origin
• The end of the muscle
that moves is called the
insertion
Muscle pairs in action
Antagonistic pairing
Right click on the hyperlink to open it in a
new window
The muscle that contracts is called the agonist
The muscle that relaxes is called the antagonist
Now complete ‘Tasks 4 and 5’
on page 135 in
Folens GCSE PE for Edexcel
Muscle tone
• Muscles rarely relax completely
• Their constant state of readiness is
called muscle tone
• Muscle tone helps with maintaining good
posture
• Good posture is important for general health
and also important in many sports
• Now read page 137 and complete task 7