Why do elbows face dorsally while knees face ventrally?
A. During development, the upper limbs rotate medially about 90 degrees and the lower limbs rotate laterally about 90 degrees.
B. During development, the upper limbs rotate laterally about 90 degrees while the lower limbs rotate medially about 90 degrees.
C. The upper limbs rotate laterally about 180 degrees and the lower limbs rotate medially about 180 degrees.
D. The upper limbs rotate medially about 180 degrees and the lower limbs rotate laterally about 180 degrees.
E. Both limb buds flatten and turn at about day 38.
B. During development, the upper limbs rotate laterally about 90 degrees while the lower limbs rotate medially about 90 degrees.
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Keratinocytes
A. produce skin pigments in cell organelles called melanosomes. B. are responsible for the reduction of water loss from the skin. C. determine thickness of the skin. D. are special cells of the immune system. E. are found in both the dermal and the epidermal layers of the skin.
In the diagram, this structure directs cellular activities
a) D b) F c) G d) A e) H
Antigens introduced into the body are normally countered by antibodies. If ________ (specifically, plasma cells) were not functioning correctly, this protection would fail
Fill in the blank(s) with the appropriate word(s).
After you measure TV and vital capacity, you must also calculate ________ before you can determine total lung capacity
A) inspiratory volume B) residual volume C) inspiratory capacity D) expiratory reserve volume