EMT-B Chapter Questions
1.- The human body is a well-designed system in which form, upright posture, and movement are
provided by the musculoskeletal system. The system also protects the vital internal organs of the
body; however, the bones and muscles are susceptible to external forces that can cause injury, the
tendons, the joints, and the ligaments are also at risk of injury.
2.- The muscular system includes three types of muscles: skeletal, smooth, and cardiac. The
skeletal muscle is a striated muscle because of its characteristic stripes, attaches to the bones and
usually crosses at least one joint. It is called voluntary muscle because it is under direct voluntary
control of the brain, responding to commands to move specific body parts.
Smooth muscle, also called involuntary muscle because it is not under voluntary control of the
brain, performs much of the automatic work of the body.
Cardiac muscle is a specially adapted involuntary muscle with its own regulatory system.
The skeleton gives us our recognizable human form, protects our vital internal organs and allows
us to move, it
is made up of approximately 206 bones.
3.- A fracture is a broken bone, it is a break in the continuity of the bone, often occurring as a
result of an external force.
A dislocation is a disruption of a joint in which the bone ends are no longer in contact, the
supporting ligaments are often torn, usually completely, allowing the bone ends to separate
completely from each other.
A sprain is an injury to ligaments, articular capsule, synovial membrane, and tendons crossing
the joint, after the injury, the joint surfaces generally fall back into alignment, so the joint is not
A strain, or muscle pull, is a stretching or tearing of the muscle, causing pain, swelling, and
bruising of the soft tissues in the area.
An amputation is an injury in which an extremity is completely severed from the body.
4.- The four mechanism of injuries are: Direct blows, indirect forces, twisting forces, and high-
5.- A closed fractures is when there is obvious damage to the bone or joint but there is no
breaking of the skin present, with open fractures, there is an external wound, caused either by the
same blow that fractured the bone or by the broken bone ends lacerating the skin.
6.- The severity of an injury must be recognize within the Golden Period, for it is critical not
only for life, but also for preserving limb viability. In an extremity with anything less than
complete circulation, prolonged hypoperfusion can cause significant damage; any suspected
open fracture or vascular injury is considered a medical emergency.
7.- Long-term disability is one of the most devastating consequences of an orthopaedic injury,