Physicians are currently able to correct spina bifida at around the seventh or eighth month of pregnancy using
A. genetic engineering.
B. fetal surgery.
C. chorionic villus sampling.
D. ultrasound.
Answer: B
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The symptoms of narcolepsy suggest an intrusion of ____ stage of sleep into wakefulness
Fill in the blank(s) with correct word
How long does an ultradian cycle typically last?
A. about 24 hours B. 90-120 minutes C. half a year D. 28 days
Why is it difficult to determine estimates of how many people are afflicted with lifelong chronic pain?
A. Sufferers often do not report their experience. B. The census does not usually include data on chronic pain sufferers. C. Studies usually include different populations and use different criteria for determining what is chronic pain. D. Recovery rates among chronic pain sufferers are so sporadic that it is difficult to keep up with the correct estimates.
A penile strain gauge
A) was used by Masters and Johnson to study changes in women's internal sex organs. B) measures a man's erectile response by recording changes in the length of the penis. C) indicates the level of blood congestion by measuring the amount of light reflected from the internal sex organs. D) measures a man's erectile response by recording changes in the circumference of the penis.