Why Do Wrist Extensor Muscles Contract When a Person Flexes

question 45

Multiple Choice

Why do wrist extensor muscles contract when a person flexes his or her fingers to make a fist?

• A)they contract as fixators (stabilizers)to prevent the hand from flexing at the wrist joint
• B)they contract as fixators (stabilizers)to prevent the hand from extending at the wrist joint
• C)they contract as antagonists to prevent the fingers from extending
• D)they contract as antagonists to prevent the fingers from flexing

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Definitions:

Height and Weight

The measurement of an individual's stature from head to foot and their body mass, respectively, which are often used to assess health and development.

Myelination

The process of forming a myelin sheath around the nerves, which facilitates faster transmission of electrical signals in the nervous system.

Neural Pathways

Networks of neurons in the nervous system that transmit signals between different parts of the body, crucial for the functioning of the brain and body.

Cerebral Cortex

The outer layer of the brain, responsible for complex mental processes such as thinking, decision-making, and language.