What type of muscle is skeletal muscle?

Prepare for the CDC 4N051 Aerospace Medical Exam. Explore vital concepts with flashcards and multiple-choice questions, each providing hints and explanations. Ace your exam!

Skeletal muscle is classified as voluntary and striated. This means that it operates under conscious control, allowing individuals to intentionally contract or relax the muscles for various movements, such as walking or lifting objects. The striated appearance comes from the organized arrangement of myofilaments (actin and myosin) within the muscle fibers, which creates a banded pattern under a microscope.

This characteristic structure plays a crucial role in the functionality of skeletal muscle, facilitating the rapid and forceful contractions needed for locomotion and posture. The voluntary nature of skeletal muscle is essential for a wide range of physical activities, enabling precise control of movements.

In contrast, involuntary muscles, such as smooth and cardiac muscle, operate autonomously without conscious thought, which distinguishes them from skeletal muscle. Thus, recognizing these defining traits confirms that the classification as voluntary and striated is entirely appropriate for skeletal muscle.

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