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Muscular System

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Brewster

Brewster

Followers: 7

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Muscular System Anterior Hip Muscles

The longest muscle in the body plays a key role in complex hip movements and balance

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Which anterior hip muscle is unique for crossing both the hip and knee joints, enabling it to flex the hip and extend the knee?

Rectus femoris Iliopsoas Sartorius

Nellieger

I am studying psychology

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Muscular System Subscapularis Muscle

Hidden powerhouse of shoulder stability and internal rotation

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What is the primary functional role of the subscapularis muscle in the shoulder joint?

It internally rotates the humerus and stabilizes the shoulder joint. It externally rotates the humerus and stabilizes the shoulder joint. It primarily abducts the arm and has no role in joint stabilization.

Brewster

Brewster

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Muscular System Anterior Thigh Muscles

The longest muscle in your body is a multitasking marvel shaping how you move your legs

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Which of the following best explains the functional significance of the sartorius muscle in the anterior thigh compartment?

It enables multiple joint movements including hip flexion, abduction, lateral rotation, and knee flexion, contributing to complex leg positioning. It primarily provides the power for knee extension during running and jumping. It is the shortest muscle in the body and only assists in stabilizing the hip joint.

Steeeve

Steeeve is an IT guru

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Muscular System Digastric Muscle

A muscle with two bellies and two nerves controls jaw opening and swallowing

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How does the digastric muscle's dual innervation affect its function in jaw and throat movements?

It allows the muscle to perform distinct actions like depressing the mandible and elevating the hyoid bone through separate nerve controls. It causes the muscle to contract only when both nerves fire simultaneously, limiting its movement. The dual innervation means the muscle can only perform one function at a time, either jaw movement or throat movement.

Steeeve

Steeeve is an IT guru

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Muscular System Masticatory Muscles

The jaw's powerful chewing muscles can exert forces up to 200 pounds per square inch

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Which muscles are primarily responsible for opening the jaw during mastication?

Masseter and temporalis muscles Geniohyoid, mylohyoid, and digastric muscles Medial and lateral pterygoid muscles

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