Asked by Olivia Galvan on May 10, 2024
Verified
Which of the following muscles straightens an arm or leg?
A) Abductor muscle
B) Adductor muscle
C) Extensor muscle
D) Flexor muscle
Extensor Muscle
A muscle whose contraction extends or straightens a joint, often opposing a flexor muscle that bends the joint.
Arm
The upper limb of the human body, extending from the shoulder to the hand.
Leg
The leg is the part of the lower limb in humans between the knee and the ankle, comprising bones, muscles, blood vessels, and nerves that support locomotion and weight bearing.
- Classify muscles based on their roles in joint movement.
Verified Answer
MK
Maria KarlaMay 17, 2024
Final Answer :
C
Explanation :
The extensor muscle is responsible for straightening an arm or leg, while the flexor muscle is responsible for bending it. The abductor muscle moves a limb away from the body, while the adductor muscle moves it towards the body. Therefore, C is the best choice as it is the only muscle listed that straightens a limb.
Learning Objectives
- Classify muscles based on their roles in joint movement.