The figure illustrates bones, fontanels, and sutures on the fetal skull. What does "A" represent?
A. anterior fontanel
B. posterior fontanel
C. parietal bone
D. sagittal suture
E. occipital bone
C
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What is the purpose of the reticulum?
What will be an ideal response?
Which of the following factors of the internal environment is not homeostatically maintained?
a. its concentration of nutrient molecules. b. its concentration of nitrogen gas, of which 80% of the atmospheric air is composed. c. its concentration of oxygen and carbon dioxide. d. its pH. e. its temperature.
What part of the heart's conduction system acts as the primary pacemaker?
A. Bundle of His B. Purkinje fibers C. SA node D. AV node
Which of the following movements is a good example of flexion?
A) opening the mouth B) turning the hand palm upward C) extreme backward bending of the head D) moving the hand toward the shoulder E) spreading the fingers