Paper 1 Flashcards
(150 cards)
Functions of skeleton
Protect vital organs Muscle attachment Joints for movement Platelets Red/white blood cells Store calcium and phosphorus
4 classifications of bone, what they do and example
Long: movement/lever (femur)
Short: weight bearing (carpals)
Flat: protect/attach (cranium)
Irregular: protect/attach (vertebrae)
Joint definition
Where 2 or more bones meet and movement occurs
4 classifications of joints and examples
Hinge: knee
Ball and socket: hip
Pivot: atlas and axis (neck)
Condyloid: wrist
Flexion
Angle at joint decreases
Extension
Angle at joint increases
Abduction
Limb moves away from body midline
Adduction
Limb moves towards body midline
Rotation
Bone at a joint moves around it’s own axis
Example of rotation
Shoulder during swimming front crawl
Circumduction
Conical (cone shape) movement
Circumduction example
Shoulder during swimming butterfly
Plantar flexion
Toes point down
Dorsi flexion
Toes point towards shin
Ligaments definition and function
Connect bone to bone
Keep joints stable preventing unwanted movement that may cause injury
Tendons definition and function
Muscle to bone
When muscle contracts pulls tendon which pulls bone
3 muscle types
Cardiac
Voluntary
Involuntary
Cardiac muscle characteristics
Found in heart
Unconsciously controlled
Voluntary muscle characteristics
Skeletal muscles that provide movement
Conscious control
Involuntary characteristics
Found in blood vessels
Unconscious control
Eg vascular shunting
Describe antagonistic pair
Causes a movement
Agonist is prime mover (contracts)
Antagonist relaxes
4 antagonistic pairs
Bicep-tricep
Quadriceps-hamstring
Gastrocnemius-tibialis anterior
Hip flexor-gluteus maximus
Fibre type 1 profile
Slow twitch/speed of contraction
Produce low force/power
High endurance
Fibre type lla profile
Fast twitch/moderate contraction
Produce high force
Medium endurance