Outline the events of intramembranous ossification
What will be an ideal response?
Intramembranous ossification begins when osteoblasts develop in the primary ossification center. Osteoblasts secrete organic material, which calcifies. Early spongy bone is formed, and then early compact bone is formed.
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Cytotoxic T cells
A. secrete perforin, which kills bacteria and viruses by perforating the membrane or coat that surrounds them. B. secrete proteins that neutralize bacterial toxins. C. are activated by interleukin 1. D. are converted to plasma cells when activated by MHC proteins. E. require Class I MHC proteins to recognize foreign antigens.
When the effects of water-soluble hormones on their target cells are considered, the hormone itself is
A. the G protein. B. the second messenger. C. the first messenger. D. the hormone-response element. E. the phospholipase.
________ is the most common type of immediate hypersensitivity.
Fill in the blank(s) with the appropriate word(s).
Bone remodeling may occur
A. as bones grow. B. constantly during a person's lifetime. C. as fractures heal. D. as bones adjust to stress. E. All of the choices are correct.