Yellow bone marrow contains a large percentage of ________
A) Sharpey's fibers
B) elastic tissue
C) fat
D) blood-forming cells
C
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Answer the following statements true (T) or false (F)
1. The cranial vault of the skull is also called the calvaria. 2. There are seven cervical, twelve thoracic, and five lumbar vertebrae. 3. Lordosis affects the thoracic vertebrae. 4. All vertebrae possess a body, a spine, and transverse foramina. 5. The dens articulates with the axis.
Which of the following is an example of passive immunity?
A. A vaccine B. Antibody production by B cells C. A gamma globulin shot D. A booster shot
Define autoimmune disorders
A) Autoimmune disorders are conditions that result from the production of antibodies directed against normal antigens in the body. B) Autoimmune disorders are an inadequate immune responses due to problems with embryonic development of lymphoid organs and tissues, a viral infection, or treatment with or exposure to immunosuppressive agents. C) Autoimmune disorders are an immune response to a circulating antigen that stimulates mast cells throughout the body to release chemicals that prompt the inflammatory response. D) Autoimmune disorders are excessive immune reactions of antibodies to a virus-infected cell. E) Autoimmune disorders are excessive immune responses to an allergen, which is an antigen that triggers an allergic reaction.
The phase of mitosis that begins with the arrival of a group of single-stranded chromosomes at each pole of the cell is
A. metaphase. B. anaphase. C. telophase. D. prophase. E. S phase.