MICROANATOMY

MUSCLE NERVE CARTILAGE BONE

SKELETAL MUSCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Contracting the gastrocnemius muscles to elevate the body on the toes involves a ____ lever.
A
first-class
B
second-class
C
third-class
D
fourth-class
Explanation: 

Detailed explanation-1: -Answer and Explanation: Contracting the gastrocnemius to elevate the body on the toes is one of the few examples of a second-class lever in the body.

Detailed explanation-2: -2nd class lever: Gastrocnemius/Soleus-plantarflexion against resistance with the ball of the foot as the fulcrum.

Detailed explanation-3: -Along with the soleus muscle, the gastrocnemius forms half of the calf muscle. Its function is plantar flexing the foot at the ankle joint and flexing the leg at the knee joint.

Detailed explanation-4: -The contraction of gastrocnemius produces a movement known as plantar flexion. This statement is TRUE. The gastrocnemius muscle, more commonly known as the calf muscle, will contract to pull the toes of the foot down into a pointed position. This action at the ankle is known as plantar flexion.

Detailed explanation-5: -1. First class lever – the fulcrum is in the middle of the effort and the load. This type of lever is found in the neck when raising your head to head a football. The neck muscles provide the effort, the neck is the fulcrum, and the weight of the head is the load.

There is 1 question to complete.