Biomechanics Unit 2 Quizzes

All muscle contractions are classified as either isometric or isotonic. True False

a

The muscles that perform radioulnar supination include all of the following except? A. Anconeus B. Biceps brachii C. Supinator D. Brachioradialis

a

Actions of the brachioradialis muscle include all of the following except? A. Flexion of the elbow B. Pronation from a supinated position to neutral C. Supination from pronated position to neutral D. Weak flexion of the shoulder

d

Fusiform muscle fiber arrangement results in a circular pattern. True False

f

Isokinetic muscle contractions involve a dynamic movement wherein the speed of movement is variable. True False

f

The synergist muscle of an activity is considered to be the primary mover. True False

f

There are two major types of fiber arrangements which are parallel and pennate. True False

t

The insertion of the triceps brachii muscle is the olecranon process of the ulna. Correct True False

a

The location of the erector spinae muscles enables them to extend spine and assist in rotation and lateral flexion. True False

a

The origin of the triceps muscle includes all of the following except? A. Supraglenoid tubercle above the superior lip of the glenoid fossa of the scapula B. Infraglenoid tubercle below the inferior lip of glenoid fossa of the scapula C. Upper half of the posterior surface of the humerus D. Distal 2/3 of the posterior surface of the humerus

a

The pelvic girdle rotates as a unit due to movement occurring in hip lumbar spine. True False

a

The rectus abdominis muscle can control the tilt of the pelvis when contracting. True False

a

The term "action" refers to a specific movement of a joint that occurs as a result from a concentric muscle contraction. True False

a

The term "innervation" is used to describe a segment of nervous system and is defined as being responsible for providing a stimulus to muscle fibers within a specific muscle or portion of a muscle. True False

a

The term "intrinsic" usually pertains to muscles within or belonging solely to the body part upon which they act. True False

a

All of the following are bony landmarks located on the humerus except? A. Medial condyle B. Coranoid process C. Coranoid fossa D. Trochlea

b

Contractility is the ability of muscle to contract and develop tension or internal force in the same direction as a resistive force when stimulated. True False

b

Eccentric muscle contractions are referred to as muscle actions instead of a contraction since the muscle is shortening as opposed to lengthening. True False

b

It is not possible for a muscle to cause more than one action in an associated joint. True False

b

Kyphosis is increased posterior concavity of thoracic curve of the vertebral column. True False

b

Movement at the elbow by the forearm away from the shoulder is accurately described by the term "flexion". Correct True False

b

Supination refers to internal rotary movements of the radius on the ulna. Correct True False

b

Which of the following is not considered to be a large abdominal muscle? A. rectus abdominis B. external oblique abdominal C. lateral abdominus D. quadratus lumborum

c

Which of the following statements is not correct regarding the abdominal muscles? A. some sections of these muscles are linked by fascia and tendinous bands B. these muscles do not attach completely from bone to bone C. both of the above choices are correct D. none of the above choices are correct

c

Which of the following muscles does not act in flexion of the elbow? A. Biceps brachii B. Brachialis C. Brachioradialis D. Pronator quadratus

d

When viewed from the anatomical position which of the following is located posterior surface of the arm? A. Anconeus B. Pronator Quadratus C. Biceps brachii D. Pronator Teres

a

A substantial number of low back problems are caused by improper use of the back over time. True False

a

Actions of the biceps brachii include all of the following except? A. Pronation of the forearm B. Flexion of the elbow C. Supination of the forearm D. Weak flexion of the shoulder joint

a

Actions of the elbow and radioulnar joints occur in all of the following planes except? A. Frontal B. Transverse C. Sagittal D. Horizontal

a

Functions of the abdominal muscles include assisting in spinal stabilization and respiration. True False

a

Increased pressure on the spinal nerves may result from a herniated lumbar disc and result in radiating pain, tingling, numbness, and weakness in the lower extremity. True False

a

Isotonic contractions are described as either concentric or eccentric on basis of whether shortening or lengthening of the muscle occurs. True False

a

Medial epicondylitis is also known as golfer's elbow. Correct True False

a

Reduction of the spine is defined as a return movement from lateral flexion to a neutral position. True False

a

Skeletal muscles are responsible for movement of the body as a whole and movement within each of the joints of the body. True False

a

The erector spinae are considered to be agonist muscles during extension of the spine. True False

a

The origin of the biceps brachii muscle includes the supraglenoid tubercle above the superior lip of the glenoid fossa. Correct True False

a

Vertebrae increase in size from the cervical to the lumbar region because the lower back supports more weight. True False

a

When antagonist muscles contract concentrically they perform the opposite joint motion of the agonist muscle. True False

a

When performing a pushup the biceps brachii is considered to be an antagonist muscle. Correct True False

a

The diaphragm depresses and draws the central tendon forward during exhalation. True False

b

The insertion of the brachialis muscle is the coracoid process of the ulna. Correct True False

b

The insertion of the brachioradialis muscle is the proximal end of the radius at the styloid process. Correct True False

b

The lateral supracondylar ridge is an anatomical landmark located on the ulna. Correct True False

b

The muscles that perform radioulnar pronation include all of the following except? A. Brachioradialis B. Brachialis C. Pronator teres D. Pronator quadratus

b

The olecranon process is located on the medial aspect of the ulna. Correct True False

b

The posterior portion of the trunk contains the abdominal muscles. True False

b

The scapula and clavicle serve as the proximal attachments for the muscles that flex and extend the elbow. True False

b

The term "extensibility" refers to the ability of a muscle to return to its original length following stretching. True False

b

Which of the following is the sole action of the brachialis muscle? A. Weak flexion of the shoulder B. Flexion of the elbow C. Pronation from supinated position D. Supination from a pronated position

b

While in the anatomical position the radius is medial with respect to the ulna. Correct True False

b

Radioulnar supinators include all of the following except? A. Biceps brachii B. Supinator muscle ] C. Brachialis D. Brachioradialis

c

When viewed from the anatomical position which of the following is located anterior surface of the arm? A. Anconeus B. Supinator Teres C. Triceps Brachii D. Pronator teres

d

Which of the following statements is correct regarding the diaphragm muscle? A. responsible for breathing during quiet rest B. as it contracts and flattens air is inspired C. when larger amounts of air are needed other thoracic muscles have a more significant contribution to inspiration D. all of the above choices are correct

d

Eccentric muscle "actions" result from isometric muscle contractions. True False

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