The gastric enzyme ________ is secreted in inactive form and activated by the low pH of gastric juice.
A. rennin
B. trypsin
C. intrinsic factor
D. pepsin
Answer: D
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The anatomic term for the calf is
A. crural.?B. popliteal.?C. tarsal.?D. carpal.?E. sural.
Lizards that display sociality are viviparous species; in contrast, oviparous lizards do not appear to form long-term associations with other individuals of their species
What differences between these two groups of lizards might account for the difference in behavior?
Which of these causes inhalation/inspiration?
A. increase in the curvature (upward movement) of the diaphragm B. movement of the ribs closer together due to contraction of the internal intercostal muscles C. flattening (downward movement) of the diaphragm D. contraction of the abdominal muscles E. alveolar pressure increasing above atmospheric pressure
Which of the following structures is part of the vascular tunic?
A. Iris B. Retina C. Optic disc D. Cornea E. Fovea centralis