The skull contains ________ bones
A) 32
B) 22
C) 42
D) 12
E) 27
B
You might also like to view...
Bundles of nerve fibers (neuron processes) running through the CNS are called ________, whereas in the PNS they are called ________.
Fill in the blanks with correct words.
When blood calcium levels rise above normal, osteoclast activity is inhibited by the hormone ___.
Which of the following makes it possible for even a small quantity of hormone to have a strong effect on its target cell?
A) The antagonistic effect B) Enzyme amplification C) Up-regulation D) Down-regulation E) Negative feedback inhibition
Which of the following is not a function of astrocytes?
A) They create a three dimensional framework for the CNS. B) They maintain the blood-brain barrier. C) They guide neuron development. D) They rebuild injured neurons. E) They adjust the composition of the interstitial tissue.