You would expect the bones of a growing child to have extremely active ____
a. osteoclasts
b. fibroblasts
c. osteoblasts
d. adipocytes
e. chondrocytes
ANSWER: c
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Members of the Ecdysozoa (select all that apply)
A. secrete a cuticle made of protein. B. secrete a cuticle made of calcium carbonate. C. molt during growth. D. have trochophore larvae. E. have lophophores.
Which type of lake has the largest amount of nutrients?
A) eutrophic B) oligotrophic C) dystrophic D) lotic
A neurophysiologist is investigating nerve reflexes in two different animals: a crab and a fish. Action potentials are found to pass more rapidly along the fish's neurons. What is the most likely explanation?
A) The fish's axons are smaller in diameter; small axons transmit action potentials faster than large axons do. B) Unlike the crab, the fish's axons are wrapped in myelin. C) There are more ion channels in the axons of the crab compared with fish axons. D) Unlike the crab, the fish's axons are wrapped in myelin, and the fish's axons are smaller in diameter; small axons transmit action potentials faster than large axons do.
Clinical significance of cell walls
What will be an ideal response?