Exam 27: Reproduction and Embryonic Development

Contractions in uterine smooth muscle during labor are initiated by

-In which part of the human female reproductive system does fertilization normally take place?

Suppose that during the embryonic development of a hand, homeotic gene expression is altered such that the dorsal-ventral axis is switched. What is the most likely outcome of this scenario?

Which statement regarding birth control is true?

At which gestational age does a developing human fetus first look obviously human and not like other vertebrate embryos?

For IVF to be completed successfully, several ________ should be removed from Brittany's ovaries.

Coral reefs are made up of genetically alike coral polyps. New polyps develop as offshoots from the parental polyp. What type of reproduction do coral polyps use?

Asthenozoospermia is a medical condition that is characterized by reduced sperm motility. What structure of the sperm is likely affected in a man who has asthenozoospermia?

A vasectomy is a form of male sterilization in which each vas deferens is cut, but most of the male's reproductive physiology remains intact. Which of the following will not continue to occur in a male who has had a vasectomy?

Which structure generates the ATP that is required for movement of the sperm's tail?

Suppose that diploid cells of the seminiferous tubules encounter errors during the cell cycle and mitosis. This results in the primary spermatocytes having a 4n number of chromosomes. Assuming that meiosis proceeds normally, which of the following would be true?

The text indicates that the digestive tract in vertebrates is ventral to (beneath) the backbone. Yet our digestive tract is in front of our backbone, which is still considered ventral. Why is this an appropriate statement?

After being produced in the testes, sperm mature further in a structure called the

Which is a direct result of cleavage?

Home pregnancy test kits can detect whether a woman is pregnant within 1 to 3 weeks of her egg being fertilized. The test kits include a short strip of paper that extends from a plastic case. After a woman urinates on the strip of paper and waits 3 to 5 minutes, a symbol is displayed on a small window in the plastic case. Some tests show a single line to indicate the woman is not pregnant (negative result) and two lines to indicate she is pregnant (positive result). Others show a minus or plus sign (or some other variation) to indicate negative and positive results. The test reports a positive symbol if it detects the presence of HCG in the woman's urine. In order for HCG to be detected, it must be present in the urine at a concentration of at least 10 to 100 units per milliliter. Even though home pregnancy tests are well designed and have been tested extensively, false negative and false positive results do occur. A false positive occurs when a test tells a woman that she is pregnant when she really is not, and a false negative occurs when a test tells a woman that she is not pregnant when she really is. Most home pregnancy test kit manufacturers claim that their tests are over 99% accurate. -If you were designing a home pregnancy test kit, which of the following statements would you include in the instructions in an attempt to minimize false negative results?

Which structure develops from mesodermal tissue?

Which of the following statements regarding infertility and fertilization procedures is true?

Fertilization in the female reproductive tract typically occurs in the

Which process does not aid expulsion of an infant by contractions during labor?

-Which part of this figure depicting the human male reproductive system is the epididymis?