Review for Exam 2 Semester 2

Which of the following is the correct association:

• Antagonist for elbow extension: Long head of Triceps Brachii

• Agonist for shoulder adduction: Pectoralis minor

• Prime mover for elbow flexion: Biceps Brachii, Long head

• Prime mover for elbow extension: Medial and Lateral heads of Triceps Brachii

What type of muscle contraction maintains our posture and each muscle's state of readiness to contract fully?

• isometric

• tetanic

• tonic

• isotonic

Synergist for Lateral Rotation of the shoulder at the Glenohumeral joint includes which of the following?

• Latissimus dorsi

• Infraspinatus

• Deltoid, posterior head

• Deltoid, anterior head

Which microscopic fiber in muscle is formed by the end-to-end arrangement of sarcomeres?

• actin

• myosin

• myofiber

• myofibril

Which muscle is NOT a synergist for shoulder extension at the Glenohumeral Joint?

• Teres minor

• Infraspinatus

• Latissimus dorsi

• Long head of the Triceps Brachii

What change occurs in a muscle during an eccentric contraction?

• tension decreases and the muscle shortens

• there is no change in muscle tension or length

• the muscle lengthens and movement is slowed

• None of the above

Even though movements are rarely created by one single muscle, the one that is largest and has the best angle of pull across the joint is generally considered the:

• agonist

• synergist

• antagonist

• fixator

Fascia is classified as what type of connective tissue?

• Dense regular ("organized fibrous" according to textbook)

• Dense cartilaginous

• Dense irregular ("disorganized fibrous" according to textbook)

• Loose areolar

What class of lever are most joints of the body?

• third

• fourth

• first

• second

The key characteristics of skeletal muscle include being excitable, contractile:

• semi-rigid yet pliable

• elastic and avascular

• fibrous and disorganized

• extensible and elastic