During dark adaptation,
a. photopigments are gradually regenerated
b. rhodopsin is rapidly broken down
c. the sensitivity of the photoreceptors is reduced so that the image appears dim
d. the bipolar cells are no longer inhibited
e. only b and c occur
A
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The physical mechanism responsible for blushing is
A) cyanosis. B) an increased amount of melanin. C) dilation of superficial blood vessels. D) decreased amounts of carotene. E) None of the answers are correct.
Which of the following fontanels are paired, occurring in 2 different places on the fetal skull?
A. Mastoid and sphenoidal B. Mastoid and posterior C. Anterior and sphenoidal D. Anterior and posterior E. All of the fontanels are paired in the fetal skull.
________ tissues respond quickly to outside stimuli by means of changes in membrane potential.
A. Responsive B. Epithelial C. Adipose D. Connective E. Excitable
Which of the following organs/structures lie in the retroperitoneal space of the abdomen?
A. Liver B. Spleen C. Kidneys D. Superior vena cava