Muscular System Overview Quiz

The epimysium connects collagen fibers directly to the periosteum, facilitating a muscle-bone connection.

Skeletal muscles convert the chemical energy of ATP into mechanical energy for movement.

Skeletal muscles adapt to perform movement, maintain stability, and facilitate communication.

<p>Indirect attachments occur as epimysium collagen fibers extend into tendons, merging with the periosteum.</p> Signup and view all the answers

<p>The parallel strands of collagen fibers in skeletal muscles are visible, contributing to the muscle grain.</p> Signup and view all the answers

<p>Skeletal muscles must attach to different bones at each end, spanning at least one joint.</p> Signup and view all the answers

<p>Skeletal muscles maintain posture by resisting the pull of gravity and stabilizing the body.</p> Signup and view all the answers

<p>The biceps brachii acts as a synergist to the brachialis during elbow flexion.</p> Signup and view all the answers

<p>The gluteus maximus is the largest muscle in the buttock and plays a key role in hip extension and stabilization.</p> Signup and view all the answers

<p>The brachialis is the prime mover for elbow flexion, while the triceps brachii serves as its antagonist.</p> Signup and view all the answers

<p>The linea alba is a fibrous band that runs down the midline of the abdomen, providing structural support.</p> Signup and view all the answers

<p>Intrinsic muscles act on a specific region with both origin and insertion within that region, while extrinsic muscles originate elsewhere but exert force on that region.</p> Signup and view all the answers

<p>Sphincter muscles are ringlike muscles that control body openings and passages, commonly found in areas such as the eyelids and pupils.</p> Signup and view all the answers

<p>During muscle activity, the contraction of one muscle moves the attached bone while the other bone remains stationary.</p> Signup and view all the answers

<p>Connective tissue layers like endomysium, perimysium, and epimysium provide support, blood vessel access, and organize muscle fibers.</p> Signup and view all the answers

<p>The 'origin' is the stationary attachment of a muscle, while the 'insertion' is the moving attachment.</p> Signup and view all the answers

<p>The arrangement of connective tissue layers and muscle fibers influences muscle strength and the direction in which they pull.</p> Signup and view all the answers

<p>Fusiform muscles are thick in the middle and tapered at the ends, which aids in efficient force generation, such as seen in biceps brachii.</p> Signup and view all the answers

<p>A parallel muscle has a long, strap-like shape with uniform width, such as the rectus abdominis.</p> Signup and view all the answers

<p>Muscle activity generates approximately 85% of the body's heat.</p> Signup and view all the answers

<p>'Proximal' refers to the attachment closer to the body's center, while 'distal' refers to the further attachment from the center.</p> Signup and view all the answers

<p>A convergent muscle is fan-shaped, with a broad origin that narrows into an insertion.</p> Signup and view all the answers

<p>Unipennate muscles have fascicles arranged on one side of a tendon, while bipennate muscles have fascicles on both sides of a tendon.</p> Signup and view all the answers

<p>Deep fasciae are located between adjacent muscles, providing support and allowing movement between them.</p> Signup and view all the answers

<p>Innervation refers to the nerve supply to an organ, crucial for muscle contraction and control.</p> Signup and view all the answers

<p>In a multipennate muscle, fascicles converge on a single point from multiple directions, unlike unipennate muscles which have fascicles on one side of the tendon.</p> Signup and view all the answers

<p>Direct attachment refers to muscle fibers attaching directly to bone without an intervening tendon.</p> Signup and view all the answers

<p>Superficial fascia acts to connect muscles to the skin and provides cushioning and insulation.</p> Signup and view all the answers

<p>Pennate muscles are characterized by fascicles inserting obliquely onto a tendon.</p> Signup and view all the answers

<p>Interosseous muscles are examples of unipennate muscles, which control finger movements by having fascicles on one side of the tendon.</p> Signup and view all the answers

<p>The rectus femoris exemplifies a bipennate muscle, functioning in knee extension and hip flexion.</p> Signup and view all the answers

<p>A fixator muscle stabilizes a bone, allowing other muscles to act upon it.</p> Signup and view all the answers

<p>A synergist assists the prime mover by increasing power and coordination during the movement.</p> Signup and view all the answers

<p>Circular muscles form rings around body openings to facilitate closing movements.</p> Signup and view all the answers

<p>A prime mover is the muscle that produces the most force during a specific joint action, while an antagonist opposes this movement.</p> Signup and view all the answers

<p>Muscles can be named based on their shape, such as rhomboideus or trapezius, and location like pectoralis or femoris.</p> Signup and view all the answers

<p>'Longus' refers to a longer muscle, while 'brevis' indicates a shorter muscle.</p> Signup and view all the answers

<p>Stabilizers maintain bone positions, while prime movers are responsible for producing force in movements.</p> Signup and view all the answers

<p>The triceps function as antagonists to the biceps during elbow flexion.</p> Signup and view all the answers

<p>Muscles usually work in groups to produce coordinated movements effectively.</p> Signup and view all the answers

<p>Agonist refers to the muscle that is contracting to produce a specific movement.</p> Signup and view all the answers