10 Questions
In a first class lever, where is the fulcrum located?
Between the effort and the resistance
What serves as the effort in the example of raising the head?
The neck muscles
What is the load (resistance) in the example of raising the head?
The weight of the head
Which lever type is exemplified by the ankle when plantar flexion occurs?
Second class lever
What acts as the fulcrum in the ankle example?
The ball of the foot
Where is the load (resistance) situated in a third class lever?
At the other end
What would be considered as the effort in a bicep curl?
The bicep muscle
What type of lever has its fulcrum at one end and the effort at the other?
Second class lever
What is an example of a second class lever in action?
A sprinter exploding out of the blocks
In a third class lever, where is the effort situated?
In the middle
Study Notes
Levers in the Human Body
First Class Lever
- In a first class lever, the fulcrum is located between the effort and the load.
Raising the Head
- The neck muscles serve as the effort in raising the head.
- The head serves as the load (resistance) in raising the head.
Ankle Plantar Flexion
- The ankle exemplifies a first class lever when plantar flexion occurs.
- The joint acts as the fulcrum in the ankle example.
Third Class Lever
- In a third class lever, the load (resistance) is situated between the effort and the fulcrum.
- The effort is situated at the end of a third class lever.
Bicep Curl
- The bicep muscle serves as the effort in a bicep curl.
Second Class Lever
- A second class lever has its fulcrum at one end and the load at the other end.
- An example of a second class lever in action is a wheelbarrow.
Effort and Fulcrum
- A first class lever has its fulcrum at one end, the load in the middle, and the effort at the other end.
Test your knowledge of first and second class levers with this quiz. Learn about the placement of the fulcrum, effort, and load/resistance in different types of levers through practical examples.
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