#10 BI 121: Muscular System Part 1-Muscle Actions, Components of Skeletal Muscle, Parts/Roles of Muscles, Histology, and Connective Tissue

Flexion

Identify the action indicated by the arrow.

Extension

Identify the action indicated by the arrow.

Hyperextension

Identify the action indicated by the arrow

Abduction

Identify the action indicated by the arrow.

Adduction

Identify the action indicated by the arrow.

Supination

Identify the action indicated in "A"

Pronation

Identify the action indicated in "B"

Medial Rotation

Identify the action indicated by the arrow.

Lateral Rotation

Identify the action indicated by the arrow.

Elevation

Identify the action indicated by the arrow.

Depression

Identify the action indicated by the arrow.

Retraction

Identify the action indicated by the arrow.

Protraction

Identify the action indicated by the arrow.

Eversion

Identify the action indicated by the arrow.

Inversion

Identify the action indicated by the arrow.

Dorsiflexion

Identify the action indicated in "A"

Plantar Flexion

Identify the action indicated in "B"

Circumduction

Identify this action.

Tendon

What is the name for connective tissue which attaches muscle to bone? (#8)

Epimysium

Name this muscle covering. (#7)

Perimysium

Name this muscle covering. (#2)

Endomysium

Name this muscle covering. (#6)

Fascicle

What is the name for this bundle of fibers covered by perimysium? (#5)

Muscle Belly

The bulk of the muscle is referred to as the what?

Origin

Where the fixed (unmoving) end of a muscle attaches to bone is called what?

Insertion

The site where the movable end of a muscle attaches to bone is called what?

Prime Mover

The muscle whose contraction is responsible for the desired action is called what?

Antagonist

The muscle whose action is the opposite of the desired action is called what?

Synergist

The muscle whose contraction aids the prime mover is called what?

Fixator

A muscle which stabilizes the joint for an action to occur is called what?

Skeletal Muscle Tissue

Identify this tissue.

Striations

What are these lines called?

Smooth Muscle Tissue

Identify this tissue.

Cardiac Muscle Tissue

Identify this tissue.

Intercalated Discs

What are these dark structures?

Epicranial Aponeurosis

Identify this connective tissue structure.

Linea Alba

Identify this connective tissue structure.

Thoracolumbar Fascia

Identify this connective tissue structure.

Extensor Retinaculum

Identify this connective tissue structure.

Flexor Retinaculum

Identify this connective tissue structure.

Iliotibial

This structure is called the ___________ tract [band, or fascia.]

Calcaneal Tendon

Identify the connective tissue highlighted. Note: this is also known as the Achilles Tendon.

Patellar Ligament

Identify this connective tissue structure.