An ________ is a mature bone cell.
A. osteoprogenitor
B. osteoblast
C. osteoclast
D. osteocyte
Answer: D
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In echinoderms and chordates, the mouth forms second; therefore, both are__________________
Fill in the blank with the correct word.
Answer the following statements true (T) or false (F)
1. Positive chemotaxis is a feedback system that signals leukocyte migration into damaged areas. 2. A condition of leukocytosis indicates over 11,000 white blood cells per cubic millimeter in the blood. 3. Basophils increase in number when parasitic invasion occurs. 4. Leukopenia is an abnormally low number of leukocytes. 5. A person with type B blood could receive blood from a person with either type B or type O blood.
A(n) ________ consists of a combination of a weak acid and its associated anion
A) water balance B) exchange pump C) leak channel D) fixed acid E) buffer system
There is a total of ________ deciduous teeth and ________ permanent teeth.
A. 22; 34 B. 20; 32 C. 24; 36 D. 20; 36