Flashcards in Chapter 9: Skeletal System: Articulations Deck (132)
By monitoring stretching within the joint, the nervous system can detect changes in our posture and ______
adjust body movements
are composed of dense regular connective tissue but they are not part of the synovial joint itself, they bind bone to bone.
When a muscle contracts, the ____ from the muscle moves the bone to which it is attached, thus causing movement at the joint.
Tendons help _____ joints because they pass across or around a joint to provide mechanical support, and sometimes they limit the _____ of movement permitted at a joint.
range or amount
Synovial joints usually have bursae and ____ as accessory structures in addition to the main components just described.
a fibrous, saclike structure that contains synovial fluid and is lined internally by a synovial membrane.
Bursae are associated with most ___ joints and are where bones, ligaments, muscles, skin, or tendons overlie each other and rub together.
Bursae may be either connected to the joint cavity or ____.
completely separate from the joint cavity.
An elongated bursa called a ____ wraps around a tendon where there may be excessive friction.
Tendon sheaths are especially common in the confined spaces of the ____ and ____.
wrist and ankle
Are often distributed along the periphery of a synovial joint and act as packing material and provide some protection for the joint.
Often ____ fill the spaces that form when bones move and the joint cavity changes shape.
the bone moves in just one plane or axis
the bone moves in two planes or axes
the bone moves in multiple planes or axes
multiaxial or triaxial joint
In a ____ joint only allows limited side-to-side movements in a single plane, and because there is no rotational or angular movement with this joint.
A _______ an elongated, rigid object that rotates around a fixed point called the _____.
Levers have the ability to alter or change the speed and distance of movement produced by a force, the direction of ____, and the force strength.
an applied force
Movement occurs when an ____ applied to one point on the lever exceeds a ____ located at some other point.
The part of a lever from the fulcrum to the point of effort is called the _____.
The lever part from the fulcrum to the point of resistance is the ____.
A long bone acts as a ____, a joint serves the ___, and the effort is generated by a muscle attached to the bone.
Three classes of levers found in the human body
In a first class lever, the fulcrum is between the resistance and the effort
In a second class lever, the fulcrum and the applied effort
In a third class lever, the effort is in between the fulcrum and the resistance
two opposing articular surfaces slide past each other in almost any direction; the amount of movement is slight
Gliding, angular, rotational, and special movements are the types of motions that occur in the ______.
the angle between articulating bones increases or decreases
a bone pivots around its own longitudinal axis
types of movement that do not fit in to rotational, gliding, or angular motion.