Osteomyelitis causes destruction of bone tissue primarily by
A. inhibiting bone marrow production of osteoclasts.
B. suppressing the production of RANKL by osteoblasts.
C. stimulating apoptosis in osteoclast cells.
D. promoting inflammation and overstimulation of osteoclast activity.
Answer: D
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The outer layer of the trophoblast that burrows into the lining of the uterus is the
A. embryoblast. B. syncytiotrophoblast. C. cytotrophoblast. D. morula. E. zona pellucida.
Each of the following lists some of the tissue layers of the digestive tract. Which one has them in correct order, from lumen to external surface?
A. Serosa, lamina propria, submucosa, muscularis mucosae, muscularis externa B. Mucosa, submucosa, muscularis mucosae, muscularis externa, lamina propria C. Mucosa, submucosa, muscularis externa, lamina propria, serosa D. Lamina propria, muscularis mucosae, submucosa, muscularis externa, serosa E. Mucosa, muscularis mucosae, submucosa, muscularis externa, lamina propria
At the end of meiosis I there are ________, whereas at the end of meiosis II there is/are ________.
A. two diploid (2n) cells; one haploid (n) cell B. two haploid (n) cells; four haploid (n) cells C. two diploid (2n) cells; four haploid (n) cells D. two haploid (n) cells; one diploid (2n) cell E. two diploid (2n) cells; one diploid (2n) cell
Ganglion cells are stimulated optimally by ________.
A. a bar of light moving on the retina B. light striking the entire retinal surface C. a bar of light striking a spot on the retina D. light striking a spot on the retina