BCC Embryology 1

Haploid nuclei that fuse at fertilization are called:



The first week of human development is characterized by formation of the:

During implantation, the blastocyst:

Capacitation of the sperm:

The early stages of cleavage are characterized by:

The amniotic cavity develops:

During the second week of development, the trophoblast differentiates into:

The first two intraembryonic germ layers to differentiate are the:

The blastocoele becomes the:

The bilaminar germ disc:

The primitive streak first appears at the beginning of the _____ week.

Which of the following structures is believed to be a primary organizer or inducer during organogenesis?

Cells from the primitive streak DO NOT become:

The primitive streak:

In the third week of human embryonic development:

During development, the notochordal process:

The following organs are derived from mesoderm EXCEPT:

Somites:

Almost all of the internal organs are well laid down at _____ months.

The notochord is replaced by the:

After folding of the head region, the structure lying just caudal to the pericardial cavity is the:

The fact that general and special sensory information from the posterior part of the tongue is carried by glossopharyngeal nerve indicates that this part of tongue is from branchial arch _____.

As a resident in pediatrics, you are called to see a newborn who has a unilateral cleft lip and a unilateral cleft of the primary palate. This condition is most likely the result of:

Which of the following structures is NOT part of the first branchial arch?

Which structures are derived from the intermaxillary segment of the embryonic face?

The foramen cecum of the adult tongue:

Each pharyngeal arch includes:

Which of the following are associated with the 2nd pharyngeal arch?

The tracheoesophageal septum separates the:

A 28-year-old woman who does not know that she is pregnant undergoes a chemotherapy treatment at the end of her 1st week of pregnancy. Chemotherapy is associated with slowing the rate of mitosis in exposed cells, which is good in cancer treatment. However, this treatment may also have a negative influence on the implantation and growth of an embryo. In which of the following layers would a lowered rate of cell division be most likely to hinder implantation of the blastocyst?