When a hormone binds to a membrane–bound receptor,
A. membrane channels are destroyed.
B. cyclic GMP might be produced to act as an intracellular mediator.
C. the nucleus is phosphorylated to prevent G-protein activation.
D. messenger RNA is formed.
E. cellular DNA is altered.
B
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For intramembranous ossification to take place, which of the following is necessary?
A medullary cavity forms. The cartilage matrix begins to deteriorate. An ossification center forms in the fibrous connective tissue. A bone collar forms around the cartilage model.
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