Answer the following statements true (T) or false (F)
1. The gripping of the trochlea by the trochlear notch constitutes the "hinge" for the elbow joint.
2. The ligamentum teres represents a very important stabilizing ligament for the hip joint.
3. The structural classification of joints is based on the composition of the binding material and the presence or absence of a joint cavity.
4. Synovial fluid contains phagocytic cells that protect the cavity from invasion by microbes or other debris.
5. A person who has been diagnosed with rheumatoid arthritis would be suffering loss of the synovial fluids.
1. TRUE
2. FALSE
3. TRUE
4. TRUE
5. FALSE
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Which of the following is due to an aging cardiovascular system?
A. Veins lose collagen. B. The tunica interna thickens. C. The direction of blood flow in some capillaries reverses. D. Arteries become less rigid.
Which of the following is NOT a concept of the cell theory?
A) The cell is the basic unit of life. B) The metabolic activities of individual cells in a multicellular organism are coordinated and essential for survival. C) Each cell of a multicellular organism maintains its own metabolism. D) All cells arise spontaneously.
Which of the following cells is from a different lineage than the rest?
A. Proerythroblast B. Erythrocyte colony-forming unit C. Erythroblast D. Myeloblast E. Reticulocyte
Cells that secrete cytokines, which coordinate specific and nonspecific defenses, are called
A) B cells. B) plasma cells. C) helper T cells. D) mast cells. E) NK cells.