Quiz 2 Flashcards
3 types of muscle tissue
Skeletal, cardiac, and smooth
Skeletal muscle
the most common type, 600 types
Smooth muscle
Lines blood vessels
Cardiac muscle
found in the heart
Skeletal muscle
Connects to two bones, the attachments are called origin and insertion
Voluntary muscle
Skeletal muscle
Involuntary muscle
Cardiac and smooth muscle
Skeletal and cardiac muscles have…
Striations
The origin is ___ and the insertion is ___
Immovable; movable
A muscles main motion is called
Agonist motion
A muscles relaxed or opposite motion is called
Antagonist motion
Flexion
The angle between two bones decreases
Extension
The angle between two bones increases
Abduction
Moving away from the midline
Adduction
Moving towards the midline
Ball and socket joint flexion
Moving forward
Ball and socket joint extension
Moving back
Elevation
To close the mandible
Depression
To open the mandible
Protraction
Pushing the jaw outwards
Retraction
Pulling the jaw inwards
Rotation
Moving a body part in one plane
Circumduction
Made up of four motions: flexion, abduction, extension, and adduction
Pronation
Palm down
Supination
Palm up
Prone
Lying on stomach
Supine
Lying face up
Opposition
Thumb to pinky
Inversion
Turning the foot toward the midline
Eversion
Turning the foot away from the midline
Dorsiflexion
Bringing the foot upwards
Plantarflexion
Bringing the foot downwards
Buccinator Origin
Maxilla and mandible
Buccinator Insertion
Orbicularis oris
Buccinator Action
Compresses cheeks
Pectoralis Major Origin
Clavicle, sternum, and coastal cartilages of the rib
Pectoralis Major Insertion
Greater tubercle
Pectoralis Major Action
Flexes shoulders, adducts humerus
Trapezius Origin
Occipital bone, spinous process of C7, and all thoracic vertebrae
Trapezius Insertion
Acromial extremity of clavicle, scapular spine
Trapezius Action
Elevates and adducts scapula
Sternocleidomastoid Origin
Clavicle
Sternocleiodomastoid Insertion
Mastoid process
Sternocleidomastoid Action
Together = flex neck, head to shoulder
Masseter Origin
Zygomatic arch
Masseter Insertion
Mandible
Masseter Action
Elevated mandible
Adductor longus Origin
Pubis
Adductor longus Insertion
Posterior femur
Adductor longus Action
Adducts
Biceps femoris Origin
Ischial tuberosity, femur
Biceps femoris Insertion
Fibular head
Biceps femoris Action
Flexes knee, extends hip
Deltoid Origin
Acromion and scapular spine
Deltoid Insertion
Deltoid tuberosity of the humerus
Deltoid Action
Abducts humerus
Triceps brachii Origin
Scapula and humerus
Triceps brachii Insertion
Olecranon process of the ulna
Triceps brachii Action
Extends elbow
Biceps brachii Origin
Coracoid process and supra glenoid tubercle
Biceps brachii Inseetion
Radial tuberosity
Biceps brachii Action
Flexes elbow, supinates hand and wrists
Supinator Origin
Lateral epicondyle of humerus, proximal ulna
Supinator Insertion
Proximal radius
Supinator Action
Supinates forearm