Which of the following scientists first observed the actual fertilization of the egg by the sperm in sea urchins?
A. Oskar Hertwig
B. Anton van Leeuwenhoek
C. Henry Havelock Ellis
D. Richard von Krafft-Ebing
Answer: A
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Derek and Earl are interested in having anal sex. What should they know about anal sex prior to engaging in this activity?
a. The anus and rectum produce an excessive amount of lubrication when aroused. b. The likelihood of damage to the rectal walls is very high. c. Use of a condom decreases all risks of transmission of STIs. d. Penetration should occur quickly and deeply to prevent hemorrhoids.
Heterosexual women have the lowest rates of sexually transmitted infections
Indicate whether the statement is true or false.
What is a "biological" reason to explain the high rates of sexually transmitted infections in teenage girls?
a. Teens are more likely to have multiple sexual partners. b. Teens are less likely to use condoms. c. A young woman's vaginal flora is more acidic. d. A young woman's vaginal flora is less acidic.
All the taboos and myths that surround sex among elders have resulted in some negative attitudes that have generally denied these citizens their rights in retirement settings.
Answer the following statement true (T) or false (F)