When Infants Are Held Upright Over a Treadmill

question 114

Multiple Choice

When infants are held upright over a treadmill

• A)most three-month-olds demonstrate alternate stepping.
• B)most six- and seven-month-olds demonstrate alternate stepping.
• C)only 10-month-olds demonstrate alternate stepping.
• D)only infants who could walk already demonstrate alternate stepping.

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Definitions:

Sarcomere

The basic unit of muscle fiber responsible for muscle contraction, consisting of actin and myosin filaments.

Muscle Contraction

The process by which muscle fibers generate force and shorten or lengthen to produce movement.

Vertebrate Joints

Connective structures between bones in vertebrate animals, facilitating movement and providing mechanical support.

Joints

Structures that connect two or more bones in the body, allowing for mobility and flexibility.