Emma has tritanopia. When she looks at the world, she sees shades of red and green. Her experience of color vision is caused by a lack of __________.
A. blue cones
B. red cones
C. green cones
D. yellow cones
Answer: A
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A family of chemicals produced in the body that resemble opiates are the
a) dopamines. b) acetylcholines. c) endorphins. d) biogenic amines.
Although it may become the leading cause in the near future, which factor currently ranks SECOND as a cause of preventable deaths in the United States?
a. smoking. b. unsafe sexual behavior. c. alcohol abuse. d. being overweight.
How can child abuse be prevented?
a. by strengthening parenting skills in the general population b. it cannot be prevented c. by making child abuse a crime d. by taking abused children out of the environment and placing them in foster care
Conduction hearing impairment refers to hearing problems that originate in the __________
a) outer ear. b) inner ear. c) eardrum and middle ear. d) auditory pathways and brain.