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CDC 1-2
Synovial Joints
Question | Answer |
---|---|
Ball-shaped end of one bone fits into the socketshaped end of another bone. Rotational movement in all directions is possible. Ex. Shoulders Hips | Ball and socket |
Rounded convex surface of one bone end fits into the concave end of another bone. Movement in one direction only is possible. Ex. Elbows Fingers Toes | Hinge |
Cylinder-shaped end of one bone fits inside the ringshaped end of another bone. Ex. Rotational movement. Proximal ends of the radius and ulna. Neck (turning the head from side-to-side). | Pivot |
Proximal ends of the radius and ulna. Neck (turning the head from side-to-side). Ex. Wrists and ankles | Gliding |
Oval-shaped end of one bone fits inside the curved end of another bone. Possible to move in most directions except rotational. Ex. Finger knuckles | Condyloid |
Combined concave and convex (wavy) bone ends are joined. Varieties of movements are possible. Ex. Thumb where it joins with the hand | Saddle |
______ of the nervous system stimulate muscle action | Neurotransmitters |
The process of blood cell formation is referred to as _____. | hematopoiesis |
A soft mass of tissue called _____ is found within the medullary cavities of some bones. _____ is essential to the production of new blood cells. | Marrow |
As a person ages, much of the red marrow is gradually replaced by _____. _____ marrow serves mostly as a fat storage tissue and does not play a major role in blood cell production. | Yellow |
______ serves to assist in the formation of erythrocytes, leukocytes and thrombocytes in infants and children. This type of marrow is _____ because of the hemoglobin content of the erythrocytes. | Red marrow |