MLT GlobeAnatomy: Muscular system – page 2
25 Anatomy MCQs on Muscular system with answers and explanations.
Which rotator cuff muscle inserts on the upper facet of the greater tubercle of the humerus?
Supraspinatus inserts on the greater tubercle and starts abduction. Subscapularis inserts on the lesser tubercle; teres major and latissimus on the intertubercular groove.
Which muscle is considered the chief flexor of the forearm at the elbow in all positions?
Brachialis inserts on the ulna and flexes the elbow whether the forearm is pronated or supinated. Biceps is strongest in supination.
Which statement about tendons is correct?
The endomysium, perimysium and epimysium merge to form tendons of dense regular collagen that attach muscle to bone. Ligaments join bone to bone; an aponeurosis is a flat, sheet-like tendon.
Which thigh muscle can flex the hip and also flex the knee?
Sartorius crosses the front of the hip and back of the knee, flexing both. Rectus femoris flexes the hip but extends the knee; biceps femoris extends the hip.
Muscles with fibres running parallel to their line of pull, such as fusiform muscles, typically have:
Long parallel fibres shorten over a large distance, giving range. Pennate muscles pack more fibres obliquely, gaining power but losing range.