In compact bone, the matrix rings that surround the central canal of each osteon are called
A. perforating canals.
B. interstitial lamellae.
C. circumferential lamellae.
D. canaliculi.
E. concentric lamellae.
Answer: E
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Pernicious anemia caused by a lack of intrinsic factor is specifically treated by
A) oral doses of iron. B) injections of iron. C) oral doses of vitamin B12. D) injections of vitamin B12. E) blood transfusion.
During transcription
A. an RNA molecule is formed as a DNA sequence is read. B. a protein is formed as a DNA sequence is read. C. a DNA sequence is formed as a RNA sequence is read. D. an amino acid is transferred to a ribosome as a DNA sequence is read. E. a protein is formed as a RNA sequence is read.
Most amine and peptide hormones circulate in the plasma as free hormones, whereas steroid hormones are mostly bound to circulating binding proteins.
Answer the following statement true (T) or false (F)
If a chemotherapy drug prevents the mitotic spindle from forming during the M phase of the cell cycle, then what specific phase has been disrupted?
A) telophase B) prophase C) anaphase D) metaphase