The Supraspinatus Is Named for Its Location on the Posterior

question 32

Multiple Choice

The supraspinatus is named for its location on the posterior aspect of the scapula above the spine. What is its action?

• A) to help hold the head of the humerus in the glenoid cavity and rotate the humerus laterally
• B) to stabilize the shoulder joint and help prevent downward location of the humerus and to assist in abduction
• C) to extend and medially rotate the humerus and to act as a synergist of the latissimus dorsi
• D) to flex and adduct the humerus and to act as a synergist of the pectoralis major

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Definitions:

Initiation Step

The first step in a chain reaction mechanism in which reactive species capable of propagation are generated.

Chlorination

A chemical reaction where chlorine is added to another substance, often used in the synthesis of organic compounds and as a method for water disinfection.

Methane

A simple hydrocarbon with the formula CH4, representing the simplest alkane and the main component of natural gas.

Termination Reaction

A chemical reaction that halts the growth of a polymer chain by removing reactive intermediates, ending the polymerization process.