Discuss the effects of thalidomide on pregnant women.
What will be an ideal response?
Answers will vary. Thalidomide was marketed in the 1960s as a treatment for insomnia and nausea and provides a dramatic example of critical periods of vulnerability to teratogens. A fetus's extremities undergo rapid development during the second month of pregnancy. Thalidomide taken during this period almost invariably causes birth defects, such as missing or stunted limbs. The drug is no longer prescribed for pregnant women.
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Suppose that several high school algebra teachers are trying to encourage their students to use analogies more appropriately when they try to solve word problems. The teachers should instruct students
a. to make an educated guess about the answer before trying to solve it. b. to make a matrix that shows the surface similarities between a current problem and a previous problem. c. to sort a number of problems into categories, based on structural similarities. d. to use the hill-climbing heuristic.
Which of the following is an example of evidence showing that non-perceptual processes play a role in perception?
a. Perception of the steepness of a hill increases when the participants are wearing heavy backpacks. b. A patient with blindsight (D.B.) experiences negative afterimages. c. Texture gradients influence our perception of depth. d. Removal of a portion of the right visual cortex results in a scotoma.
Sleep apnea refers to
a. vivid recurrent nightmares. b. a breathing problem during sleep. c. excessive daytime sleepiness. d. sudden sleep attacks.
The period of development from conception to birth is called the __________
a. neonate period b. prenatal period c. natal period d. postnatal period