Levers, Planes and Axes

Question 1

Which class of lever is the Diagram?

Answer 1

1st Class

Fulcrum is in the middle

Question 2

During Plantarflexion of the ankle, what class of lever is being used?

Answer 2

2nd Class

Resistance is in the middle

Question 3

What does a third Class lever look like?

Answer 3

Question 4

How do you work out mechanical advantage?

Answer 4

Effort arm / resistance arm

Question 5

What is the benefit of a lever system of having a short effort arm?

Answer 5

Gives rapid movements over a large range of movement

Question 6

What is the benefit of a lever system of having a short resistance arm?

Answer 6

Able to move a heavy weight

Question 7

Complete this:

1 F T/Neck

2 _ G

_ E _

Answer 7

1 F TRICEP/NECK

2 L GASTROCNEIMUS

3 E BICEP/ANY OTHER MUSCLE

Question 8

What do you understand by the term ‘Antagonistic muscle action’

Answer 8

As one muscle contracts the second relaxes

Question 9

Define Isotonic muscle contraction

Answer 9

Muscle action where the muscle changes length - causing movement

Question 10

Define Isometric muscle contraction

Answer 10

Muscle action where the muscle stays the same length - used in balances e.g. the plank/headstand

Question 11

Define concentric muscle contraction

Answer 11

Isotonic muscle contraction where the muscle shortens

Question 12

Define eccentric muscle contraction

Answer 12

Isotonic contraction where the muscle lengthens - used to control downward movements

Question 13

Which plane is this?

Answer 13

Sagittal

Question 14

What does the Transverse plane divide the body into?

Answer 14

Top and Bottom

Question 15

Which plane is this?

Answer 15

Frontal

Question 16

Can you name the 3 axis through the body?

Answer 16