A&P Lab - Muscles

The attachment site of a muscle that moves most when the muscle is contracted is called the

Insertion

The neuromuscular junction consists of ____.

a motor neuron and a muscle cell with a specialized membrane

A neuron and all the muscle fibers it stimulates is called a ____.

motor unit

Zygomaticus Origin

Zygomatic Bone

Pectoralis Major origin

Sternum

Sternocleidomastoid origin

Manubrium and Clavicle

Masseter origin

Zygomatic Arch

Rectus abdominis origin

Pubic Symphysis

Intercostal action

Forceful breathing/exhalation

Orbicularis Oris Action

Close/pucker lips

Latissimus Dorsi Action

Adduct, medially rotate arm

Zygomaticus Action

Elevate corners of the mouth

Orbicularis Oculi

Close eyes

Rectus Abdominis Action

Flex Spinal Column

Pectoralis Major Action

Flex the arm at the shoulder, adduct arm

Masseter Action

Elevate mandible

Sternocleidomastoid Action

Rotate head

Diaphragm

Inspiration

Latissimus Dorsi Insertion

Intertubercular Sulcus

Sternocleidomastoid Insertion

Mastoid Process

Rectus Abdominis Insertion

Xiphoid and Ribs

Pectoralis Major Insertion

Intertubercular sulcus

Masseter Insertion

Mandible

What information can you get by decoding the muscle name Vastus lateralis?

Action
Size

Location

The parallel dark bands on a skeletal muscle cell that show the presence of its contractile proteins are called:

Intercalated Discs

Move away from the midline of the body

Abduction

Moving distal limb bones to be parallel

Supination

Turn toward the midline of the body

Adduction

Moving the foot inferiorly at the ankle

Plantar Flexion

Decreasing the angle at a joint

Flexion

Lowering

Depression

The deep muscle that separated the abdominal and thoracic cavities and functions in breathing.

Diaphragm

When a muscle contracts the ___moves least.

Origin

Temporalis Insertion

Mandible (second)

Zygomaticus Insertion

Skin on mouth corner

Masseter Origin

Maxilla

Supraspinatus, Infraspinatus, Teres Minor, and Subscapularis Origin

Scapula

Supraspinatus, Infraspinatus, and Teres Minor Insertion

Greater Tubercle of Humerus

Subscapularis Insertion

Lesser tubercle of humerus

Deltoid origin

Scapula and Acromion

Deltoid Insertion

Deltoid Tuberosity

Triceps Brachii Origin

Humerus

Triceps Brachii Insertion

Olecranon Process

Biceps Brachii Origin

Scapula (second)

Biceps Brachii Insertion

Radial Tuberosity

Brachialis, Brachioradialis, and Pronator Teres Origin

Humerus (second)

Brachialis Insertion

Ulna

Brachioradialis Insertion

Radial Styloid Process

Pronator Teres Insertion

Radius

Sartorius and Tensor Fascia Latae Origin

Anterior Superior Iliac Spine

Sartorius, Rectus Femoris, Vastus Lateralis, Vastus Medialis, and Vastus Intermedius Insertion

Tibial Tuberosity

Rectus Femoris Origin

Anterior Inferior Iliac Spine

Gracilis Origin

Pubis

Gracilis Insertion

Tibia

Gluteus Maximus Origin

Ilium

Gluteus Maximus Insertion

Femur

Biceps Femoris, Semitendinosus, and Semimembranosus Origin

Ischial Tuberosity

Biceps Femoris, Semitendinosus, and Semimembranosus Insertion

Tibia

Tibialis Anterior Origin

Tibia

Tibialis Anterior Insertion

Metatarsal

Gastrocnemius Origin

Condyles for femur

Soleus Origin

Tibia (Second)

Gastrocnemius and Soleus Insertion

Calcaneus