Using the figure below, identify the labeled part.
1) Label A: ______________________________
2) Label B: ______________________________
3) Label C: ______________________________
4) Label D: ______________________________
5) Label E: ______________________________
6) Label F: ______________________________
7) Label G: ______________________________
8) Label H: ______________________________
9) Label I: ______________________________
1) Artery
2) Ridge
3) Periosteum
4) Perforating canal
5) Circumferential lamellae
6) Central canal of new osteon
7) Periosteum
8) Bone resorbed by osteoclasts
9) Bone deposited by osteoblasts
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The function of leghemoglobin in root nodules is to
A) bind oxygen. B) chelate iron. C) produce iron. D) produce nitrogen.
In chordates, the ____ is a digestive system structure just posterior to the mouth
a. pharynx b. neural crest c. oral hood d. notochord e. cranium
The connection between stem cells and cancer is that
A) all stem cells are also cancer cells. B) cells may become cancerous by expressing "stemness" genes. C) stem cells rescue cells that have become cancerous. D) both stem cells and cancer cells have inactivated telomerase.
Physician Edward Jenner promoted the use of cowpox, a harmless pathogen related to the dangerous smallpox virus, as a vaccination to provide patients immunity from future smallpox epidemics. This is an example of
A. developing high levels of complement. B. passive immunity. C. developing high levels of interferon although Jenner did not realize these diseases were viral. D. active immunity. E. an inflammatory response that decreased the IgE production and increased T cells.