Skeletal Muscles MDCAT Quiz: Skeletal muscles are one of the three types of muscle tissues found in the human body. These are voluntary muscles responsible for facilitating movement and maintaining posture. The skeletal muscles work with the skeletal system while being attached to bones by tendons, thus providing a wide range of body movements. For MDCAT students, it is very essential to understand the structure, function, and mechanism of skeletal muscles to answer related questions on muscle physiology. The MDCAT Quiz on skeletal muscles will test your knowledge regarding the anatomy of these muscles and how they work in generating force.
Structure and Function of Skeletal Muscles
Skeletal muscles are made up of very long, cylindrical fibers called muscle fibers. These are striated, meaning that they have a ‘striped’ appearance, created by the way actin and myosin filaments are arranged in the muscle cells. Contraction of skeletal muscles is voluntary; it is under nervous system control and can be controlled by the individual. Skeletal muscles have numerous functions in movements such as walking, running, lifting objects, and breathing. Each muscle consists of several bundles of muscle fibers, and these work together to generate force. The MDCAT Quiz will test your knowledge about the structure of skeletal muscle, including the arrangement of fibers, tendons, and the role of the neuromuscular junction in muscle contraction.
Types of Skeletal Muscle Contractions
Skeletal muscles contract in different ways depending on the type of movement required. The two main types of muscle contractions are isotonic and isometric. In isotonic contractions, the muscle changes length to produce movement, such as when you lift a weight. In isometric contractions, the muscle generates force but does not change length, such as when holding an object in place. Also, muscles can perform concentric contractions—shortening—or eccentric contractions—lengthening, each of which plays a key role in controlled movements. A Free Flashcard on the types of skeletal muscle contractions will help you quickly recall these key differences, which are important for your MDCAT exam.
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Quiz on Skeletal Muscles
Taking a MDCAT Quiz on skeletal muscles will help you assess how well you understand their structure, functions, and types of muscle contractions. In this quiz, be prepared to be tested on the composition of muscle fibers, the role of actin and myosin during contraction, and physiological principles of muscle movement. Using Free Flashcards will also help you memorize details related to skeletal muscle physiology, so you can feel more confident going into your MDCAT exam.
The largest skeletal muscle in the human body is the ________.
Gluteus maximus
The muscle that moves the lower jaw is the ________.
Masseter
The muscle that allows for the flexion of the arm is the ________.
Biceps brachii
The muscle located on the back of the upper arm that helps extend the forearm is the ________.
Triceps brachii
The muscle that helps in the movement of the head and neck is the ________.
Sternocleidomastoid
The muscle responsible for bending the elbow is the ________.
Biceps brachii
The primary muscle used in breathing is the ________.
Diaphragm
The large muscle group at the front of the thigh is the ________.
Quadriceps femoris
The muscle that extends the leg at the knee is the ________.
Quadriceps femoris
The muscle responsible for flexing the hip is the ________.
Iliopsoas
The muscle that controls the movement of the shoulder is the ________.
Deltoid
The muscle on the upper chest that helps in arm movements is the ________.
Pectoralis major
The muscle that helps in rotating and tilting the head is the ________.
Sternocleidomastoid
The muscle that is responsible for extending the thigh is the ________.
Gluteus maximus
The muscle located on the inner part of the thigh is the ________.
Adductor longus
The muscle that allows for the extension of the leg is the ________.
Quadriceps femoris
The muscle responsible for pulling the arm backward is the ________.
Latissimus dorsi
The muscle group located on the back of the thigh is the ________.
Hamstrings
The muscle that raises the shoulders is the ________.
Trapezius
The muscle that flexes the knee is the ________.
Hamstrings
The muscle responsible for the movement of the jaw is the ________.
Masseter
The muscle located in the lower leg that helps in plantar flexion is the ________.
Gastrocnemius
The muscle responsible for the rotation of the arm at the shoulder is the ________.
Infraspinatus
The muscle that helps bend the knee and lift the foot is the ________.
Hamstrings
The muscle that enables the arm to be raised overhead is the ________.
Deltoid
The muscle that stabilizes the shoulder joint is the ________.
Supraspinatus
The muscle responsible for the extension of the wrist is the ________.
Extensor carpi radialis
The muscle responsible for adducting the arm is the ________.
Latissimus dorsi
The muscle that helps rotate the trunk is the ________.
External oblique
The muscle responsible for turning the head to one side is the ________.
Sternocleidomastoid
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