Bone heals well after injury while cartilage does not. This can be attributed to the fact that ________
A) the cells of cartilage and bone are enclosed in small cavities called lacunae
B) bone is avascular and cartilage is highly vascular
C) the matrix of bone is solid while the matrix on cartilage is semisolid
D) bone is highly vascular and cartilage is avascular
D
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The main component of insect chitin is
A) Polysaccharide. B) Protein. C) Lipid. D) Nucleic acid.
While removing a cancerous testis, the surgeon inadvertently allowed fluid from the testis to flow over the incised skin of the scrotum. The surgeon should:
A) not be concerned about this accident. B) be concerned about a potential spread of the cancer to the superficial inguinal lymph nodes. C) be concerned about the potential spread of the cancer to lumbar lymph nodes. D) be concerned about the potential spread of the cancer to perineal lymph nodes. E) be concerned about the potential spread of the cancer to penile lymph nodes.
For each of the following species, list the term for an intact female. cat
What will be an ideal response?
During skeletal muscle contraction, to what do myosin heads bind?
A) myosin filaments B) actin filaments C) Z discs D) thick filaments E) the H zone