Which of the following organs develops from evaginations along the early digestive tract?
A. heart
B. adrenal medulla
C. lungs
D. nasal cavity
E. kidneys
C
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These receptors detect specific molecules in our external and internal environments.
A. Photoreceptors B. Mechanoreceptors C. Thermoreceptors D. Chemoreceptors E. Baroreceptors
Which connective tissue structure forms a sheath around an entire nerve?
A. Epimysium B. Endoneurium C. Epineurium D. Perineurium E. Nerve capsule
Which is an accurate description of appositional bone growth?
A. Osteoblasts build bone at the concentric lamellae while osteoclasts build bone at the epiphyses. B. Osteocytes and osteoclasts expand the bone at its epiphyses; chondrocytes construct cartilage. C. Osteocytes build bone at the interstitial lamellae while osteoclasts expand the length of the medullary cavity. D. Osteoclasts build bone at the concentric lamellae while osteoblasts build bone at the interstitial lamellae. E. Osteoblasts build bone at the circumferential lamellae while osteoclasts widen the medullary cavity.
Each immunoglobulin (Ig) has ________ antigen-bonding site(s)
A) four B) two C) one D) three E) six