MLT GlobeAnatomy: Skeletal system & joints – page 4
68 Anatomy MCQs on Skeletal system & joints with answers and explanations.
Which fibrocartilaginous rim deepens the shallow socket of the shoulder joint?
The glenoid labrum encircles the glenoid cavity, deepening it and improving stability. The coracohumeral ligament strengthens the capsule superiorly.
Which synovial joint moves around only one axis (uniaxial)?
The elbow is a hinge joint moving about a single transverse axis. The wrist is biaxial; the hip and shoulder are multiaxial.
Which statement describes the distal (lower) end of the radius?
The distal radius is broad and articulates with the carpal bones and ulna; it bears the radial styloid process. The radial head is at the proximal end.
A cross-section of cortical bone shows concentric rings around a canal carrying vessels. Which feature is present here but absent in cancellous bone?
Compact bone is built of osteons centred on Haversian canals. Trabecular bone also has lamellae, lacunae and canaliculi, but no osteons.
Which statement about synovial joints is correct?
Synovial joints have a fibrous capsule lined by synovial membrane, which secretes viscous synovial fluid rich in hyaluronic acid. Skull sutures are fibrous joints.
The glenoid labrum is a fibrocartilage rim that deepens the socket of which joint?
The glenoid labrum deepens the shallow glenoid cavity of the scapula, improving shoulder stability. The hip has its own acetabular labrum.
Which statement about blood supply of a growing long bone is FALSE?
Epiphyses have their own epiphyseal arteries. The metaphysis receives nutrient artery hairpin loops, which is why osteomyelitis in children often starts there.
A symphysis (secondary cartilaginous joint) is found between the:
The manubriosternal joint is a symphysis with fibrocartilage between bones, like the pubic symphysis and intervertebral discs. Radiocarpal and sacroiliac joints are synovial.