What event precedes the step in the bone-forming process shown in the figure?
formation of a secondary ossification center
ossification within a fibrous membrane
formation of the epiphyseal plate
calcification of the cartilage matrix
calcification of the cartilage matrix
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Chromatolysis refers to
a) break up of lysosomes after neural injury. b) Wallerian degeneration after neural injury. c) plasticity of neuron. d) break up of Nissl bodies after neural injury. e) none of these choices
In fetal circulation, what is the opening between the right and left atria called?
a) Ductus venousus b) Umbilicus c) Fossa ovalis d) Foramen ovale e) Ductus arteriosus
What is the overall percent of nutrient derived energy that is lost as heat?
a. 35% b. 50% c. 60% d. 75% e. 90%
All of the following are correct regarding DNA except
A) it contains deoxyribose sugar. B) molecular shape varies with hydrogen bonding along the length of the strand. C) the nitrogenous base is made of adenine, guanine, cytosine, and thymine. D) it stores genetic information. E) it contains a double helix.