Embryology Flashcards
1
Q
- The first indication of gastrulation in the embryo is?
A
C. Formation of the primitive stream
2
Q
- A 20-year-old woman presented to ER with severe abdominal pain on the right side with signs of internal bleeding, she missed her last menstrual period. Which of the following disorders must be included as an option in the diagnosis?
A
B. Ectopic tubal pregnancy.
3
Q
- Which of the following must degenerate for blastocyst implantation to occur?
A
D. Zona pellucida
4
Q
- During the later stages of pregnancy maternal blood is separated from fetal blood by the:
A
D. Syncytiotrophoblast and fetal endothelium
5
Q
- At the beginning of week 3 of development (day 17), what is the composition of the embryonic disc?
A
C. Ectoderm, mesoderm, &endoderm
6
Q
- The prechordal plate marks the site of the future:
A
C. Mouth
7
Q
- A 28-year-old pregnant woman experiences repeated episodes of red vaginal bleeding at week 28, 32 & 34 of pregnancy. The bleeding spontaneously subsided each time. Use of ultrasound shows that the placenta is located in the lower right portion of the uterus over the internal os. What is the diagnosis?
A
B. Placenta previa
8
Q
- The maternal & fetal components of the placenta are?
A
C. Decidua basalis & villous chorion
9
Q
- Which of the following best describes the placental components of dizygotic twins?
A
E. Two placentas, two amniotic sacs, two chorions
10
Q
The femur is derived from?
A
Lateral Plate Mesoderm
11
Q
Patterning and initial growth of the limbs primarily begins?
A
During weeks 4 - 8 of development
12
Q
A baby is born with webbing between fingers. What is the diagnosis?
A
Syndactyly
13
Q
During weeks 6 - 8 the upper limb will rotate
A
Laterally 90 degrees
14
Q
During weeks 6 - 8 the lower limb bud will rotate
A
Medially 90 degrees
