Flexor digitorum longus
Gastrocnemius and soleus
The vastus intermedius
The vastus medialis
The vastus lateralis
Extensor digitorum longus
Anterior compartment of the thigh
Posterior muscle group of the thigh
Medial compartment of the thigh
All names reflect direction of muscle fibers.
Each acts synergistically to elevate the jaw.
All act on the tongue.
All names indicate the relative size of the muscle.
Have load at one end of the lever, fulcrum at the other, and effort applied somewhere in the middle
Are typified by tweezers or forceps
In the body can operate at a mechanical advantage or mechanical disadvantage, depending on specific location
Are the type found in the joints forming the ball of the foot as used in raising the body on the toes
Iliopsoas and rectus femoris
Internal intercostals and diaphragm.
External intercostals and diaphragm.
Rectus abdominis and diaphragm.
The triceps brachii
The flexor digitorum profundus
Muscles appear to be straplike
There is a narrow origin diverging to a broad insertion
There is a broad origin and fascicles converge toward a single tendon
Muscles look like a feather
Closes, purses, and protrudes the lips
Pulls the lower lip down and back
Draws the eyebrows together
Allows blinking, squinting, and various other protective mechanisms for the eye
Biceps brachii acts as antagonist
Triceps brachii acts as antagonist
Brachioradialis acts as antagonist
Coracobrachialis acts as antagonist
The type of muscle fibers
The type of action they cause
Muscles produce movement by pulling on bones.
The bones serve as levers.
During contraction the two articulating bones move equally.
The movements produced may be of graded intensity.
Load is far from the fulcrum and the effort is applied near the fulcrum
Lever system is useless
Effort is farther than the load from the fulcrum
Load is near the fulcrum and the effort is at the distal end
The tibialis anterior
All of the hamstrings
The quadriceps femoris
The medial pterygoid
The zygomaticus major
The frontal belly of the epicranius
Extends and abducts the wrist and is short
Extends and adducts the wrist and has a small tendon
Supinates the forearm and is a superficial muscle
Extends the thumb and is a deep muscle
To help hold the head of the humerus in the glenoid cavity and rotate the humerus laterally
To stabilize the shoulder joint and help prevent downward location of the humerus and to assist in abduction
To extend and medially rotate the humerus and to act as a synergist of the latissimus dorsi
To flex and adduct the humerus and to act as a synergist of the pectoralis major
Depress the larynx and hyoid bone if the mandible is fixed
Are a group of muscles that lie superior to the hyoid bone and help form the floor of the oral cavity
Move the pharynx superiorly during swallowing
Are often called strap muscles
The muscle flexes and rotates a region
The muscle is a fixator and stabilizes a bone or joint
The muscle elevates and/or adducts a region
The muscle functions as a synergist
There are approximately the same number of muscles as bones: 206.
There are approximately 350 muscles in the body.
There are over 600 muscles in the body.
If one considers the very tiny, insignificant muscles, there are over 1000 muscles in the body.
The muscle has two, three, or four origins, respectively
The muscle is able to change direction twice, three times, or four times faster than other muscles, respectively
The muscle has two, three, or four functions, respectively
The muscle has two, three, or four insertions, respectively
The number of neurons innervating it
The total number of muscle cells available for contraction
The fascicles are short and attach obliquely to a central tendon that runs the length of a muscle
The fascicular pattern is circular
The fascicles form a triangle
The fascicles are in a fusiform arrangement
The structural characteristics of the muscles of the person using the lever
The weight of the load
The direction the load is being moved
The difference in the positioning of the effort, load, and fulcrum
Extensor hallicus longus
A first-class lever
A second-class lever
A third-class lever
A fourth-class lever