Why do objects viewed underwater with a mask appear closer and larger than they really are?
A) The mask provides additional refraction of light before it reaches the retina.
B) Light traveling through the water scatters more than it does when moving through the air.
C) Light moves more slowly through the water.
D) Water is denser than the lens of the eye.
E) The cornea does not function in water, and the light is not refracted as much.
A) The mask provides additional refraction of light before it reaches the retina.
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The portion of the aorta that gives rise to the coronary arteries is the
A. ascending aorta. B. aortic arch. C. thoracic aorta. D. abdominal aorta.
The tissue that always has a "top" and a "bottom" is ________ tissue
A) epithelial B) connective C) muscle D) basal E) apical
Of the coronary vessels listed, which one receives blood first?
A) Right coronary artery B) Marginal artery C) Circumflex artery D) Anterior interventricular artery
Which of the following is NOT a property of the myosin head?
A. They form cross-bridges with the active sites of actin. B. They have a hinge region to bend and straighten. C. They bind to troponin. D. They have ATPase activity. E. They bind to ATP.