lever systems

Question 1

list 3 hinge joints.

Answer 1

1) elbow
2) ankle
3) knee

Question 2

list 2 ball & socket joint?

Answer 2

1) shoulder
2) hip

Question 3

what are the 4 main parts to a lever?

Answer 3

1) fulcrum
2) resistance/load
3) effort
4) lever arm

Question 4

describe a first class lever system. and give 2 examples in the body.

Answer 4

fulcrum in the middle
1) extension of the elbow
2) neck contracting to hold head up

Question 5

describe a second class lever system. and give example.

Answer 5

resistance in the middle.
1) plantar flexion at the ankle.

Question 6

describe third class lever system. give an example.

Answer 6

effort in the middle.
elbow