Chapter 11- The Muscular System Flashcards
In a convergent muscle the muscle fibers are…
Based over a broad area, but all the fibers come together at a common attachment site
The four types of muscles identified by different patterns of organization are…
Parallel, convergent, pennate, and circular
A first class level is one in which…
The fulcrum lies between the applied force and the resistance
The effect of an arrangement where a force is applied between the resistance and the fulcrum illustrates the principles operating…
Third class levers
The site where the movable end of a muscle attaches to bone or other connective tissue is referred to as the…
Insertion
A muscle whose contraction is chiefly responsible for producing a particular movement is called an…
Prime mover
Muscles are classified functionally as synergists when…
Their contraction is coordinated in a way that assists another muscle in affecting a particular movement
Extrinsic muscles are those that…
Position or stabilize an organ
The reason we use the word bicep to describe a particular muscle is because…
There are two tendons of origin
Which is included in the muscles of the facial expression?
Buccinator, orbicularis oris, risorius, occipitofrontalis
The muscles that bring the teeth together during mastication are the…
Temporalis, pterygoid, and masseter
The names of the muscles of the tongue are readily identified because their descriptive names end in…
Glossus
The superficial muscles of the spine are identified by subdivisions that include the…
Iliocostalis, longissimus, and spinalis
The muscles in the abdominal region that compress the abdomen, depress the ribs, and flex or bend the spine are the…
External obliques
The muscular floor of the pelvic cavity is formed by muscles that make up the…
Urogenital triangle and anal triangle
What is included in the only muscles that move the shoulder girdle?
Trapezius, serratus anterior, pectoralis minor, subclavius
What muscles only move the upper arm?
Deltoid, teres major, latissamus dorsi, pectoralis major
The muscles that arise on the humerus and the forearm and rotate the radius without producing either Flexion or extension of the elbow are the…
Pronator teres and supinator
The pectoralis major produces………at the shoulder joint, and the latissamus dorsi muscle produces………..
Flexion; extension
The muscle groups that are responsible for movement of the thigh include the…
Adductor, gluteal, and lateral rotator
The flexors that move the lower leg, commonly known as the hamstrings, include the…
Biceps femoris, semimembranosus, and semitendinosus
The extensors that move the lower leg, commonly known as the quadriceps, include the…
Rectus femoris, vastus intermedius, vastus lateralis, and vastus medialis
Major muscles that produce plantar Flexion involved with movement of the lower leg are the…
Gastrocnemius, soleus, and tibalis posterior
The actions that the arm muscles produce that are not evident in the action of the leg muscles are…
Pronation and supination
Common functional actions of the muscles of the forearm and the upper leg involve…
Flexion and extension
One of the effects of aging on the muscular system is…
Tolerance for exercise decreases
The number of satellite cells steadily decreases with age and the…
Amount of fibrous tissue increases
For all the body systems, the muscular system…
Generates heat that helps maintain normal body temperature
While the integumentary system helps the skin surface remove excess heat generated by muscle activity,…………mechanisms are also coordinating responses to maintain homeostasis.
- Respiratory
- Nervous
- Cardiovascular
The two factors that interact to determine the effects of individual skeletal muscle contraction are the…
Anatomical arrangement of the muscle fibers and the way the muscle attaches to the skeletal system
In compartment syndrome, accumulated blood and fluid trapped within a musculoskeletal compartment results in…
Ischemia
When a muscle contracts and it’s fibers shorten, the…
Insertion moves toward the origin
The rectus muscles, which lie between the vertebral spines and ventral midline, are important…
Flexors of the spinal column
Attaching a muscle to a lever can change the…
- Direction of an applied force
- Distance and speed of movement applied force
- Strength of force
A collagenous sheet connecting two muscles is an…
Aponeurosis
What is the origin and insertion of the genioglossus muscle?
Originates at chin and inserts at tongue
The muscles that are synergistic with the diaphragm during inspiration are the….
External intercostals
When playing an instrument such as a trumpet, the muscles used to purse the lips and blow forcefully is the….
Buccinator
The most powerful and important muscle used when chewing food is the…
Masseter
If you are engaging in an activity in which the action involves the use of the levator scapulae, you are…
Shrugging your shoulders
The muscular elements that provide substantial support for the loosely built shoulder joint are collectively referred to as the…
Rotator cuff
The biceps muscle makes a prominent bulge when…
Flexing the forearm supinated
The carpal tunnels that are associated with the wrist bones are formed by the presence of…
Tendon sheaths crossing the surface of the wrist
If an individual complains because do shin splints, the affected muscles are located over the…
Anterior surface of the leg
