Exam 4: Development

There is a three-day window during which a woman is most likely to become pregnant. It extends from two days before ovulation to one day after and occurs because

Place the following in the correct order: 1) aided by enzymes on their surface, sperm penetrate the cells of the corona radiata 2) acrosomal reactions are triggered when sperm bind to receptors in the zona pellucida 3) syngamy occurs when a sperm cell binds to receptors on the oocyte's plasma membrane 4) acrosomal enzymes from many sperm digest through the zona pellucida 5) zygote is formed

Cleavage

Implantation usually occurs on the _____ wall of the fundus or body of the uterus.

Discuss the formation of both dizygotic (fraternal) and monozygotic (identical) twins.

The fetal period technically begins at

The letter D is pointing to the layer in which the _____ implants.

At the beginning of the fetal period, the fetal head is about _____ the length of the fetal body.

The _____ forms the epithelial lining of the GI tract (excluding the oral cavity and anal canal).

In a human developmental biology class, you observe a fetus that has most of the organ systems formed. However, not all of the systems are functional yet. The fetus also has some distinct human features. This fetus is most likely in which trimester of development?

The maternal part of the placenta is formed from the decidua _____.

Letter _____ is pointing to the structure where the secondary oocyte is typically fertilized by the sperm.

In order for fertilization to occur, sperm must be present in the female sometime during the first 24 hours following ovulation.

After the _____ month of development, the embryo is referred to as a fetus.

______________ is the period of time that begins with fertilization, proceeds with implantation, embryonic development, and fetal development.

The weight of the fetus doubles during the

During menstruation, part of the endometrium is shed along with the unfertilized

The _____ is a solid ball of cells resulting from cleavage.

Which of the following would be an expected change in the mother during pregnancy?

Syngamy is the fusion of the haploid male and female pronuclei to produce a diploid nucleus.