Which statement about endochondral ossification is true?
A. It forms the long bones, vertebrae, ribs, sternum, scapula, pelvis, and limb bones of the developing fetus.
B. Osteoblasts deposit bone in membranes.
C. It forms the bones of the skull in the developing fetus.
D. The site of ossification is the center of future bone.
Answer: A
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The number of covalent bonds that can be formed by a given atom depends upon the number of electrons present in the outermost orbit.
Answer the following statement true (T) or false (F)
Which of the following is a paired branch of the abdominal aorta?
A) celiac B) superior mesenteric C) inferior mesenteric D) median sacral E) renal
An inhibitory presynaptic neuron can affect a postsynaptic neuron by
A) producing an IPSP in the postsynaptic neuron. B) hyperpolarizing the plasma membrane of the postsynaptic neuron. C) causing K+ to diffuse out of the postsynaptic neuron. D) causing Cl- to diffuse into the postsynaptic neuron. E) all of the above.
ATP is
A. formed during the hydrolysis of ADP. B. used by cells for the storage of energy. C. used to transfer energy within a cell. D. a protein. E. a molecule with less total energy content than ADP.