Anatomy Chapters 10-11

Which of the following muscles of mastication would be responsible for mandibular elevation? A. Temporalis B. Lateral Pterygoid C. Stylohyoid D. Zygomaticus Major E. Zygomaticus Minor

A. Temporalis

The physician directs the medical assistant to complete a request form for an X-ray study of the fibula. The procedure will be performed on which of the following structures? A. Heel B. Lower leg C. Toes D. Thigh E. Pelvis

B. Lower leg

Which of the following muscles is in the medial compartment of the thigh? A. soleus B. adductor longus C. piriformis D. vastus medialis E. semimembranosus

B. adductor longus

The longest muscle in the human body is the

Sartorius

This is the explanation of how muscles contract

Sliding filament model

A cord or strap of dense tissue that connects a muscle to bone is called a:

Tendon

Which of the following cavities are separated by the diaphragm?

Thoracic and abdominal

The anatomic location of the spinal canal is

dorsal

In the wrist and ankle, entire groups of tendons are enclosed by a strong band of connective tissue called a ______________

retinaculum

What muscle has its origin on the sternum and inserts on the mastoid process of the temporal bone?

sternocleiodomastoid

The thenar and hypothenar muscles are located where?

within the hand

The term for shortening of a muscle while maintaining constant tension is

E. isotonic contraction.

Muscle fibers are arranged in bundles called

Fascicles

While sitting at your desk, you drop your pencil onto the floor. You bend over to pick up the pencil. In order to straighten up and continue your exam you must use which of the following muscles? A. tibialis anterior B. erector spinae C. semimembranosus D. tibialis anterior and semimembranosus E. extensor hallucis longus

B. erector spinae

After taking their wedding vows, a bride and groom often ceremonially use which of the following muscles before walking away from the altar? A. depressor anguli oris B. orbicularis oris C. levator labii superioris D. platysma E. quadriceps femoris

B. orbicularis oris

A clinician induces contraction of the gastrocnemius and soleus and notices that the foot does not plantar flex as expected. Which of the following would be a logical diagnosis? A. peroneal nerve injury B. ruptured calcaneal tendon C. anterior compartment syndrome D. shinsplints E. lateral plantar nerve injury

B. ruptured calcaneal tendon

In skeletal muscle, alternating light and dark bands are termed

B. striations.

Which of the following muscles is the prime mover for inhalation? A. Internal intercostals B. External Intercostals C. Diaphragm D. Stylohyoid E. Hyoglossus

C. Diaphragm

Tennis elbow is a common term describing injury to which of the following? A. extensor hallucis longus B. pronator quadratus C. extensor carpi radialis longus D. subscapularis E. flexor digitorum profundus

C. extensor carpi radialis longus

Which is predominately made up of myosin?

D. 4

All of the following are functions of muscles except: A. Stability B. Heat Production C. Control of openings D. Secretion E. Respiration

D. Secretion

Loss of muscle mass from lack of activity is termed

D. atrophy.

If the foot is abducted, it is moved in which direction?

Outward

A skydiver's parachute fails to deploy. After some struggle, his reserve chute deploys in time to save his life. However, his landing is harder than normal, and he feels his knee slightly hyperextend. He shakes it off and goes about his normal routine. Later that day he begins experiencing knee pain. Two days later he notices that his knee "pops" when he crouches and soon discovers he has dislocated his femur on the knee. What muscle was likely injured initially?

Popliteus