Exam 31: Reproduction and Development

During the stage called neurulation,a flexible rod,called a _______________,forms along the midline of the dorsal surface of the embryo.

The corpus luteum secretes which hormone in great abundance to inhibit FSH and to build up the lining of the uterus?

Which animal is an induced ovulator?

The layer of cells called the endoderm in the developing embryo eventually gives rise to:

How many sperm cells are produced for every one primary spermatocyte?

All birds practice internal fertilization,even though most male birds lack a penis.

In the ________________ growth pattern,different parts of the body grow or cease growing at different times.

Why are the testes suspended outside the body in humans?

Sperm,together with the secretions from several other glands,is referred to as _____________.

In a process called _______________,one female oocyte matures in the ovary and is released each month.

__________________ is the male sex hormone,responsible for secondary sexual characteristics.

The lining of the uterus builds up,ready for the implantation of a zygote,when?

The developing embryo is termed a fetus at what stage?

During which period of prenatal development is it especially critical not to consume alcohol and why?

Which of the following is a monotreme?

A human female is most likely to become pregnant on the two days preceding and following ovulation.

The muscular ring at the base of the uterus is the ___________.

The sexually transmitted diseases,_____ and _____,can cause pelvic inflammatory disease,in which fallopian tubes become scarred and blocked.

Most mammals,most cartilaginous fish,some amphibians,and a few reptiles have young developing within the female and obtaining nutrients from her blood,a relationship known as ________________.

In humans,how many ova are produced from one primary oocyte?