Functional roles of muscles and types of contraction

Question 1

Define ISOTONIC CONTRACTION

Answer 1

contractions that cause the muscle to change length, producing movement

Question 2

Define CONCENTRIC

Answer 2

contractions that cause the muscle to shorten e.g. bicep curl (upwards)

Question 3

Define ECCENTRIC

Answer 3

contractions that cause the muscle to lengthen e.g. bicep curl (downwards)

Question 4

Define ISOMETRIC CONTRACTION

Answer 4

there is no change in the length of the contracting muscle, causing no movement

Question 5

What are FIXATORS ?

Answer 5

the muscle that STABILISES the ORIGIN of the AGONIST and the JOINT that the origin moves over

Question 6

Agonist

Answer 6

Known as the prime mover and causes the movement
Muscle will shorten
Concentric contraction

Question 7

Antagonist

Answer 7

Works in opposition to the agonist
Assists in the movement by lengthening
Eccentric contraction