CONNECT: Module 5 Muscle Practical Assignment

During an action such as flexion of the elbow, the muscle that causes the action is called the ____________ .

agonist

An action, such as flexing the knee, is caused by the contraction of a muscle acting as an __________ and is opposed by a muscle acting as an __________.

agonist; antagonist

The muscle(s) that works against a particular action is called the ____________

antagonist

Origins and insertions can attach directly to bone or via dense regular connective tissue sheets referred to as ____________ or via rope-like cords called ____________ .

aponeuroses tendons

Consider the elbow joint. Muscles such as the ____________ have their origin and insertion on the anterior of the arm. Thus, contraction of this muscle causes ____________ of the elbow joint.

biceps brachii flexion

In our example of elbow flexion, the agonist would be the ____________ and the antagonist would be the ____________ .

biceps brachii triceps brachii

Muscles of the limbs tend to have their insertions located in more ____________ positions along the limbs while their origins are located more ____________ .

distal proximal

The fibers of the ____________ run down and forward from the lower ribs to the pelvic girdle and linea alba.

external oblique

Muscles that move the thigh have their insertions on the __________

femur

In order to produce movement, muscles must be attached to two different points, called an origin and an ____________ .

insertion

The end of the muscle that is attached to a bone, or other structure, that will move is called the ____________ .

insertion

The fibers of the ____________ run up and forward from the pelvic girdle to the lower ribs.

internal oblique

The location of these attachment points determine the type of movement that occurs at a ____________ .

joint

When a muscle contracts, the ____________ is the end of the muscle that is attached to a non-moving bone.

origin

One end of a skeletal muscle attaches to a relatively immovable point called its ____________ and the other end attaches to a more movable point, called the ____________ .

origin insertion

Muscles located on the______ anterior posterior of the thigh will extends and/or rotate the thigh at the hip. The muscles located on the______anterior posterior of the thigh will flex the thigh at the hip.

postierior anterior

Often there are additional muscles that assist the agonist. These muscles are called ____________ .

synergists

The fibers of the ____________ run horizontally.

transverse abdominis

In contrast, contaction of the ____________ , located on the posterior aspect of the arm, will cause ____________ of the elbow joint.

triceps brachii extension