L2 Intro to movement and muscel

Question 1

What is the function of skeletal muscle (3)

Answer 1

Movement that is under voluntary control

Posture - stability

Heat production as muscle activity expends energy thus producing heat

Question 2

4 characteristics of Muscle

Answer 2

ICEE
Irritability - ability to response to stimulation

Contractility - ability to shorten when sufficiently stimulated

Extensibility - ability to lengthen beyond its resting length when stretched by an external force

Elasticity - ability to return to its resting length after stretch

Question 3

4 STPES IN MUSCLE CONTRACTION

Answer 3

1. action potential
2. cross bridge formation
   3.power stroke
   4.recovery stroke

Question 4

What is a motor unit

Answer 4

A neúron + the muscle fibres

Question 5

What is isometric movement

Answer 5

No movement
Occurs when a muscle generate a force and attempts to shorten but does no overcome the external resistance

Question 6

What is concentric

Answer 6

a shortening contraction
Occurs when the muscle shortens and joint movement occurs as tension develops

Question 7

What is eccentric

Answer 7

Lengthening contraction
Occurs when the external resistance exceeds muscle force and the muscle lengthens while developing tension

Question 8

What is agonist or prime mover

Answer 8

generates most of the force to produce the movement

Question 9

Synergist

Answer 9

generates force to help agonist

Question 10

antagonist

Answer 10

opposes movement of the agonist

Question 11

fixator

Answer 11

stabilisers the origin of the agonist muscle

Question 12

Muscel types

Answer 12

Circular
convergent
multipennate
parrallel
unipennate
bipennate