Q. 16 - Biology

Question

The movement of bone away from the midline of the body is called ________. 

1. circumduction 
2. extension 
3. adduction 
4. abduction 

Step-by-Step Solution

Answer

The correct answer is option (d) .

The movement of bone away from the midline of the body is called abduction. 

Abduction

• Abduction is a movement away from the body's midline. 
• This happens during a jumping jack action at the hip and shoulder joints.

Step: 1 Explanation for Correct answer

• Any movement that drags the limbs or other body parts away from the body's midline is considered an abduction. 
• Abduction is the movement of the hands from the side of the body up to the shoulder or higher. Thus, the option d is correct.

Step: 2 Explanation for incorrect answer

• In circumduction, a body region is moved in a circular motion with one end remaining largely immobile and the other end describing a circle. So, option a is wrong.
• The reverse of flexion, described as a straightening action that widens the angle between two bodily components, is called extension. So, option b is wrong as well.
• Adduction unites the fingers or toes, or moves the limb or hand toward or across the midline of the body. Hence, option c is wrong too.