Muscular movements

Question 1

Agonist and antagonist

Answer 1

AGONIST is the muscle that creates movement
ANTAGONIST muscle which relaxes to allow the movement to occur

Question 2

reciprocal inhibition

Answer 2

reciprocal inhibition is used to describe the coordinated relaxing of muscles on one side of a joint to accommodate contraction on the other side of that joint

Question 3

Origin an insertion

Answer 3

ORIGIN- The bone that the origin of the muscle is attached to, does not move when the muscle contracts. (proximal end)

INSERTION- The bone that the insertion is attached to moves more when the muscle contracts.
(distal end)

Question 4

Characteristics of skeletal muscle

Answer 4

1. EXCITABILITY- The ability to contract in response to chemical and/or electrical signals.
2. EXTENSIBILITY- The capacity of a muscle to stretch beyond its normal resting length
3. CONTRACTIBILITY- The ability of a muscle to contract or shorten
4. ELASTICITY- The ability of a muscle to return to the original resting length after it has been stretched.

Question 5

Slow twich type 1

Answer 5

red
Slow contraction speed
used for endurance activities
not able to generate a significant amount of force
Fatigue resistant
Oxygen- fuel
E.g. Endurance cyclist (up to 80% slow twitch)

Question 6

Fast twich type 2a

Answer 6

white
Contractile Speed: Fast
Fatigue rate: High
force of production- relatively forceful
Energy Source: anaerobic glycolysis
EG: 400m runner

Question 7

Fast twich type 2b

Answer 7

white
Rapid contraction speed
force of production- very fourceful
used for speed, strength and power based activities
Fatigue more quickly – no oxygen
fuel source- anerobic glycosis
E.g. Sprinter (up to 90% fast twitch)