Alberta Written Barber Practice Exam

Which muscle is used to straighten the fingers and wrist?

1. Flexor

2. Extensor

3. Adductor

4. Abductor

The correct answer is: Extensor

The extensor muscle is responsible for straightening the fingers and wrist. These muscles are located on the posterior (back) side of the forearm and allow for the extension of the fingers, which means they straighten them out from a curled position. When the extensor muscles contract, they pull on the tendons that attach to the fingers and wrist, enabling you to open your hand or straighten your arm. This action is crucial for various activities, such as typing, playing musical instruments, or performing precise tasks that require finger dexterity. Understanding the role of the extensor muscles highlights the importance of muscle groups in facilitating movement and coordination in the upper limb.