Chapter 10 - Muscular System
C. agonist
A muscle that contracts to provide most of a desired movement is considered to be which of the following? A. antagonist B. synergist C. agonist D. fixator E. effector
slowly
After infancy and the toddler period, muscle tissue increases very _____, peaking during adolescence.
pennate
Examples of __________ muscles include the extensor digitorum, rectum femoris, and deltoid.
70
Skeletal muscle fibers can shorten to about _________ percent of their resting length when they contract.
pectoralis major
The ________ is triangular or fan-shaped
B. leg
The adductor magnus muscle is located in which portion of the body? A. forearm B. leg C. neck D. buttocks
D. abduct the arm
The deltoid muscle can A. raise the arm B. flex the arm C. adduct the arm D. abduct the arm
C. insertion
The more movable end of a muscle is the A. origin B. proximal end C. insertion D. distal end
B. gastrocnemius
The muscle that flexes the foot is the A. quadriceps femoris B. gastrocneumius C. gluteus maximum D. gluteus medius
mandible
The muscles of mastication move the _______ at the temporomandibular joint.
A. biceps femoris
The quadriceps muscles include all of the following except A. biceps femoris B. rectus femoris C. vastus lateralis D. vastus medialis
D. origin
The relatively immovable part to which one end of a skeletal muscle is fastened is known as the A. insertion B. flexion C. fascicle D. origin E. extension
B. thigh
The sartorius muscle is located in the A. chest B. thigh C. abdomen D. foot
False
True or False: Normally, dystrophin is a protein that helps muscles to develop during the embryonic period.
True
True or False: The biceps brachii and the long head of the triceps brachii originate on the scapula.
False
True or False: The distal joints of the fingers function only by extrinsic muscles.
False
True or False: The major abductor of all the arm muscles is the trapezoid.
True
True or False: The most important muscle of inspiration is the diaphragm.
False
True or False: The muscles that move the head originiate from the appendicular skeleton.
True
True or False: With aging, skeletal muscles become less elastic because of fibrosis.
A. diaphragm
What is the main muscle involved in the act of inspiration? A. diaphragm B. stomach C. larynx D. trachea
Deltoid
Which of the following abducts the arm? Brachioradialis Deltoid Pectoralis major Sternocleidomastoid Triceps brachii
Brachioradialis
Which of the following flexes the forearm at the elbow? Brachioradialis Deltoid Pectoralis major Sternocleidomastoid Triceps brachii
D. sternocleidomastoid
Which of the following flexes the neck? A. trapezius B. deltoid C. pectoralis major D. sternocleidomastoid
Sternocleidomastoid
Which of the following flexes the neck? Brachioradialis Deltoid Pectoralis major Sternocleidomastoid Triceps brachii
A. pectoralis major
Which of the following is a prime mover of arm flexion? A. pectoralis major B. latissimus dorsi C. deltoid D. sternocleidomastoid
A. circular muscle
Which of the following is also known as a sphincter? A. circular muscle B. fascicle C. temporalis D. pennate muscle
C. pectoralis major
Which of the following is an example of a convergent muscle? A. Biceps brachii B. orbicularis oris C. pectoralis major D. rectus femoris
Triceps brachii
Which of the following is extension at the elbow? Brachioradialis Deltoid Pectoralis major Sternocleidomastoid Triceps brachii
D. radialis longus
Which of the following is the longest muscle in the body? A. sternocleidomastoid B. adduction C. sensory neurons D. radialis longus
D. circular muscles
Which of the following is the most common type of skeletal musclke calssification? A. unipennate muscles B. fusiform muscles C. Circular muscles D. Parallel muscles
B. triceps brachii
Which of the following muscles can extend the arm when doing push-ups? A. deltoid B. triceps brachii C. biceps brachii D. pectoralis major
C. gastrocneumius
Which of the following muscles contains the calcaneal tendon? A. tibialis anterior B. vastus lateralis C. gastrocnemius D. biceps femoris
B. sternothyroid
Which of the following muscles does not depress the hyoid bone and larynx? A. geniohyoid B. sternothyroid C. sternohyoid D. omohyoid
C. erector spinate
Which of the following muscles flexes and rotates the lumbar region of the vertebral column? A. external intercostals B. diaphragm C. erector spinate D. rectus abdominis
A. pectoralis major
Which of the following muscles is located in the torso? A. pectoralis major B. external oblique C. soleus D. biceps
Pectoralis major
Which of the following pulls the arm anteriorly? Brachioradialis Deltoid Pectoralis major Sternocleidomastoid Triceps brachii
C. fast fibers
Which of the following reaches peak twitch tension in 0.01 seconds or less after stimulation? A. slow fibers B. red muscles C. fast fibers D. intermediate fibers
