Which of the following is formed from mesoderm?
A. autonomic neurons
B. dermis of the skin
C. adrenal medulla
D. teeth
E. tonsils
B
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The stretch reflex
A) is exemplified by the knee jerk, or patellar, reflex. B) if functioning normally, indicates that spinal segments T12—L1 are intact. C) is activated anytime a limb or other body segment is extended. D) All of the answers are correct. E) None of the answers are correct.
What attaches epithelial cells to the basement membrane?
A. Gap junction B. Hemidesmosomes C. Tight junction D. Adhesion belt E. Desmosomes
Regurgitation of blood flow through the aortic semilunar valve would give rise to
A. the first heart sound. B. the second heart sound. C. a heart murmur. D. an extra heart beat. E. end-systolic volume.
Which is not a feature of the ethmoid bone?
A. Cribriform foramina B. Perpendicular plate C. Orbital plate D. Inferior nasal concha E. Crista galli