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Appendicular Muscles And Muscle Contraction

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Nursing
School
Fiji National University
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Homework
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Appendicular muscles and muscle contraction
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Appendicular muscles and muscle contraction
1. What are the functions of the deltoid muscle?
Deltoid muscles have three functions:
Shoulder abduction Responsible for raising the arm outwards to
the side of the body.
Shoulder flexion Responsible for lifting the arm above the head.
Shoulder extension Responsible for the arm’s backward
movement while also allowing the shoulder to stay in its resting
position.
2. What is the function of the biceps brachii muscle?
The biceps brachii muscle facilitates forearm movement. The muscle aids
in flexion and supination. Flexion refers to the lifting of the arm, while
supination refers to the outward rotation of the forearm.
3. Name the three gluteal muscles.
Gluteus maximus
Gluteus medius
Gluteus minimus
4. What is the function of the gastrocnemius muscle?
The gastrocnemius muscles primary function is to plantarflex the ankle.
This means that the gastrocnemius muscle aids in the ankles actions, like
walking, running, and climbing up the stairs. When the foot is resting, the
muscle is responsible for its stability. The gastrocnemius muscle also
crosses the knee joint at the back and helps with movement.
5. Define the term posture.

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1 Appendicular muscles and muscle contraction Student’s name Institution Course Instructor Date 2 Appendicular muscles and muscle contraction 1. What are the functions of the deltoid muscle? Deltoid muscles have three functions: • Shoulder abduction – Responsible for raising the arm outwards to the side of the body. • Shoulder flexion – Responsible for lifting the arm above the head. • Shoulder extension – Responsible for the arm’s backward movement while also allowing the shoulder to stay in its resting position. 2. What is the function of the biceps brachii muscle? The biceps brachii muscle facilitates forearm movement. The muscle aids in flexion and supination. Flexion refers to the lifting of the arm, while supination refers to the outward rotation of the forearm. 3. Name the three gluteal muscles. • Gluteus maximus • Gluteus medius • Gluteus minimus 4. What is the function of the gastrocnemius muscle? The gastrocnemius muscle’s primary function is to plantarflex the ankle. This means that the gastrocnemius muscle aids in the ankle’s actions, like walking, running, and climbing up the stairs. When the foot is resting, the muscle i ...
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