Exam 42: Animal Reproduction

_______ involves a physician placing sperm in the female reproductive tract.

Some animals can reproduce both sexually and asexually.Why might these animals switch between sexual and asexual reproduction?

A simultaneous hermaphrodite

The contragestational pill Mifepristone (RU-486) blocks _______ receptors.

You are a physician, and one of your male patients is considering a vasectomy.He is concerned, however, with the possibility of decreased testosterone production and its effects on sexual function.What should you tell your patient?

Refer to the figure showing the human female reproductive tract. Using the figure, trace the path of a sperm to the point at which it can fertilize an egg.Indicate both the number and name of each structure it passes through on its journey.

Researchers wishing to perform experiments on organisms that are as genetically similar as possible would use offspring from an organism that reproduces _______.

If a couple combines both male and female barrier methods of contraception, such as a condom for males and a diaphragm (or cervical cap) combined with _______ for females, the couple will significantly reduce their failure rate over any of these three methods used alone, and also protect against sexually transmitted diseases.

Refer to the graph showing changes in three female reproductive hormones during pregnancy. Based on the graph, which statement is true?

Which statement characterizes in vitro fertilization?

A woman who is still lactating and nursing her 9-month old child finds out that she is once again pregnant, which is unusual because lactation normally delays the ovarian and menstrual cycles.In this woman's situation, the release of prolactin stimulated by the infant suckling was sufficient to cause the release of milk but was not sufficient to inhibit the release of _______ from the mother's hypothalamus.

Which cells result from the second meiotic division of spermatogenesis?

Refer to the figure showing the marine worm Bonellia viridis. Females of this marine worm release fertilized eggs into the water.The eggs hatch into larvae that swim and then settle on a substrate.If the larvae land on sand, they burrow in and develop into females with large bodies and a proboscis that extends into the water above to collect food.If a larva lands on a female proboscis, it burrows into the female body and becomes a tiny male whose only function is to produce sperm to fertilize the female's eggs.What selection pressures could contribute to this extreme sexual dimorphism?

Species with separate male and female members are described as _______.

Which hormone might be given to a woman who has experienced recurrent miscarriages?

A carrier is a person who carries the gene for a particular disease but does not have the disease.Suppose that a man and woman who want to have a child together know they are both carriers for a disease.What reproductive technologies might their physician recommend?

The earliest vertebrates

A genetic carrier is defined as a person who carries a specific gene for a particular disease but does not have the disease.Suppose both members of a couple know they are carriers for a disease that could be fatal for any child they produced.They would like to have children but are worried about the risk.Which procedure(s) might a physician recommend?

Honeybees and parthenogenetic whiptail lizards have which feature in common?

Women are encouraged to nurse their babies as soon as possible after giving birth because