unit 1 outcome 1- muscular system

Question 1

types of muscle fibres

Answer 1

fusiform muscles- ( fibres run parallel to each other and run the length of the muscles. Less force development that pennate but… greater range of movement…. Bicep)

pennate- ( unipennate- one sole of the central tendon calf, bipennate- quad mulipennate- deltoid), the muscles form an angle with the tendon. More muscle fibres which can produce more tension and more force. Low velocity (doesn’t move fast, not much range of movement)

Question 2

structure of a muscle

Answer 2

tendon- epimysium - fasciculi - perimysium - endomysium

Question 3

what are the 2 muscle fibre types?

Answer 3

slow twitch ( aerobic, low force, power and speed and have high endurance)
fast twitch ( short duration high intensity , anaerobic )

Question 4

There are 3 types of muscle contractions:

Answer 4

Isotonic: the muscle length changes during contractions
Concentric: muscle shortens with tension (movement, bicep curl)
Eccentric: muscle lengthens with tension( curl down)

Isometric: the muscle length remains unchanged with tension ( gripping a racket,no movement, flex, push against wall)
3. Isokinetic: maximum tension throughout whole range of movement

Question 5

what are the 2 types of fiber arrangements?

Answer 5

Fusiform: ( fibres run parallel to each other and run the length of the muscles. Less force development that pennate but… greater range of movement…. Bicep)
Pennate: ( unipennate- calf, bipennate- quad mulipennate- deltoid), the muscles form an angle with the tendon. More muscle fibres which can produce more tension and more force. Low velocity (doesn’t move fast, not much range of movement)

Question 6

reciprocal inhibition

Answer 6

Muscles work in pairs so that when a muscle contracts to create a desired movement its partner must relax and stretch to allow the bones to move this is known as

Question 7

motor unit recrutement

Answer 7

Muscles can be in a state of relaxation or contraction. There is no in between.