What part of a muscle is attached to a movable location?
Skeletal Muscle Structure
|The (BLANK) of a muscle is usually attached to a fixed location.||Origin|
|The (BLANK) of a muscle is usually attached to a movable location||Insertion|
|When the forearm is extended at the elbow joint, the (BLANK)muscles act as the prime mover (agonist).||Triceps Brachii|
What is the name of the end of a muscle attached to a bone?
The moveable end of the muscle that attaches to the bone being pulled is called the muscle’s insertion, and the end of the muscle attached to a fixed (stabilized) bone is called the origin. During forearm flexion—bending the elbow—the brachioradialis assists the brachialis. Figure 1.
Which term refers to the place where muscle attaches to the nonmoving bone?
The moveable end of the muscle that attaches to the bone being pulled is called the muscle’s insertion, and the end of the muscle attached to a fixed (stabilized) bone is called the origin. During forearm flexion—bending the elbow—the brachioradialis assists the brachialis. Figure 1. Prime Movers and Synergists.
Which term describes the more fixed attachment of a muscle that serves as a basis for movement?
temporalis. The more fixed attachment of a muscle that serves as a basis for the action is the. origin.
What is an example of a Multipennate muscle?
Multipennate muscles have fascicles that insert on multiple tendons tapering towards a common tendon, like multiple feathers converging on a central point. A common example is the deltoid muscle of the shoulder, which covers the shoulder but has a single tendon that inserts on the deltoid tuberosity of the humerus.
Which of the following is an example of a convergent muscle?
The large muscle on the chest, the pectoralis major, is an example of a convergent muscle because it converges on the greater tubercle of the humerus via a tendon. The temporalis muscle of the cranium is another.
Where do muscles get most of their energy?
The energy is derived from adenosine triphosphate (ATP) present in muscles. Muscles tend to contain only limited quantities of ATP. When depleted, ATP needs to be resynthesized from other sources, namely creatine phosphate (CP) and muscle glycogen.
What is Pennation angle of a muscle?
Pennation angle is the angle between the longitudinal axis of the entire muscle and its fibers. The longitudinal axis is the force generating axis of the muscle and pennate fibers lie at an oblique angle. As tension increases in the muscle fibers, the pennation angle also increases.
Why does a Pennate muscle generate more tension?
In Pennate muscles, the tendon runs through the length of the muscle. Fascicles pull on the tendon at an angle, thus not moving as far at the parallel muscles during a contraction. However, these muscles tend to have relatively more muscle fibers than similarly sized parallel muscles, and thus carry more tension.
What is an example of a fusiform muscle?
In general, skeletal muscles are formed by a belly and two tendons. Fusiform muscles are those in which all the muscle belly fibers are arranged parallel to each other. An example of the fusiform muscle is m. biceps brachii.
Which muscle is named for its action?
Muscles Named for Action flexor carpi radialis – flexes wrist. abductor magnus – abducts the thigh. extensor digitorum – extends the fingers. levator – lifts a structure.
What are sources of ATP for muscle contraction?
ATP is required for muscle contraction. Four sources of this substance are available to muscle fibers: free ATP, phosphocreatine, glycolysis and cellular respiration. A small amount of free ATP is available in the muscle for immediate use.
What are the three sources of ATP production?
Three sources of ATP a human body uses at the beginning of a race. Stored ATP, cellular respiration, lactic acid fermentation.
What is ATP in muscle contraction?
ATP is responsible for cocking (pulling back) the myosin head, ready for another cycle. When it binds to the myosin head, it causes the cross bridge between actin and myosin to detach. ATP then provides the energy to pull the myosin back, by hydrolysing to ADP + Pi.