Muscle Structure and Function

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Which type of muscle is responsible for stabilizing the origin of the agonist and the joint that the origin moves over?

Fixators (correct)

Longus

Maximus

Minimus

What muscle is named for its location around the cranium?

Epicranius (correct)

Serratus

Tibialis Anterior

Brachioradialis

Which muscle is named for its shape resembling a triangle?

Orbicularis

Rhomboideus

Trapezius

Deltoid (correct)

What muscle is responsible for extending the fingers?

Extensor digitorum Signup and view all the answers

What is the function of tropomyosin in muscle contraction?

To control muscle contraction Signup and view all the answers

What is the primary function of myosin in muscle fibers?

To form cross bridges with actin during muscle contraction Signup and view all the answers

Which protein is responsible for the depolarization of muscle fibers?

Acetylcholine Signup and view all the answers

What is the function of sarcolemma in the neuromuscular junction?

To create a pocket formed around motor neuron Signup and view all the answers

Which type of muscle contraction occurs when the muscle exerts force without changing length?

Isometric Signup and view all the answers

In the context of skeletal muscles, what is the origin?

The attachment of the muscle to the bone which remains stationary Signup and view all the answers

Which muscle is named after the smallest size?

Serratus Signup and view all the answers

Which muscle is a fixator around the hip joint?

Psoas major Signup and view all the answers

Which muscle assists in stabilizing the elbow during flexion and extension?

Trapezius Signup and view all the answers

Which muscle is named for its action of extending the fingers?

Extensor digitorum Signup and view all the answers

What is the function of tropomyosin in muscle contraction?

Inhibiting the interaction between actin and myosin Signup and view all the answers

What is the primary function of troponin in muscle fibers?

Controlling the position of tropomyosin on actin filaments Signup and view all the answers

What is the role of acetylcholine at the neuromuscular junction?

Inducing muscle fiber depolarization Signup and view all the answers

What is the function of sarcolemma in muscle contractions?

Conducting the action potential into the muscle fiber Signup and view all the answers

What is the primary role of the Z line in muscle contractions?

Anchoring actin filaments to the sarcomere Signup and view all the answers

What is the primary function of myosin heads (cross bridges) during muscle contractions?

Interacting with actin filaments to generate muscle force Signup and view all the answers

Muscle Structure and Function

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Questions and Answers

Which type of muscle is responsible for stabilizing the origin of the agonist and the joint that the origin moves over?

What muscle is named for its location around the cranium?

Which muscle is named for its shape resembling a triangle?

What muscle is responsible for extending the fingers?

What is the function of tropomyosin in muscle contraction?

What is the primary function of myosin in muscle fibers?

Which protein is responsible for the depolarization of muscle fibers?

What is the function of sarcolemma in the neuromuscular junction?

Which type of muscle contraction occurs when the muscle exerts force without changing length?

In the context of skeletal muscles, what is the origin?

Which muscle is named after the smallest size?

Which muscle is a fixator around the hip joint?

Which muscle assists in stabilizing the elbow during flexion and extension?

Which muscle is named for its action of extending the fingers?

What is the function of tropomyosin in muscle contraction?

What is the primary function of troponin in muscle fibers?

What is the role of acetylcholine at the neuromuscular junction?

What is the function of sarcolemma in muscle contractions?

What is the primary role of the Z line in muscle contractions?

What is the primary function of myosin heads (cross bridges) during muscle contractions?

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