Deck 4 Muscular System-Muscle contractions

Question 1

What are the two sub-sections within isotonic contractions?

Answer 1

Concentric
Eccentric

Question 2

What type of contraction is occuring when the muscle lengthens under tension?

Answer 2

Eccentric

Question 3

What type of contraction is occuring when the muscle shortens under tension?

Answer 3

Concentric

Question 4

Define an isometric contraction and provide a sporting example.

Answer 4

Muscles are contracting but the length does not change.
The angle at the joint remains the same.
The plank
The wall sit
A scrum (stationary)
Press up hold

Question 5

TRUE or FALSE
The upward phase of a movement is associated with concentric contractions

Answer 5

TRUE

Question 6

TRUE or FALSE
Eccentric contractions break down/ tear more muscle fibres

Answer 6

TRUE

Question 7

During a bicep curl the downwards phase (extension) is an eccentric contraction, what is the main agonist?

Answer 7

Bicep (acts as a brake)

Question 8

During a press up, what muscle contracts concentrically on the upwards phase and eccentrically on the downwards phase?

Answer 8

Tricep

Question 9

What three muscles demonstrate an eccentric contraction during the downwards phase of a squat?

Answer 9

Downwards eccentric phase.
Hip: Flexion (gluteals)
Knee: Flexion (quadriceps)
Ankle: Dorsiflexion (gastrocnemius)

Question 10

What are the acute responses during a isometric contraction?

Answer 10

These types of contractions lead to rapid fatigue and can cause a sharp increase in blood pressure.