EMBRYOLOGY: FIRST EXAMINATION COVERING FUNDAMENTAL
CONCEPTS OF HUMAN EMBRYONIC DEVELOPMENT,
FERTILIZATION, AND EARLY PRENATAL GROWTH
Q: What period of development stems from 9-38 weeks?
A: Fetal Period
Q: What do we call a drug/agent that can cause abnormal development? Whats
an example?
A: Teratogen
Ex: Accutane
Q: What is the period of greatest sensitivity to teratogenesis for abnormal
development?
A: Embryonic Period
Q: What developmental period spans from 3-8 weeks?
A: Embryonic Period
Q: What is Prenatal; Perinatal; & Postnatal?
A: - Before birth
- Around time of birth
- After birth
Q: What is the plane that splits the body into anterior and posterior halves?
A: Coronal (Frontal) Plane
Q: What is the vertical plane that passes through the midline of the body,
dividing it into symmetrical right and left halves?
A: Median (Midsagittal Plane)
,Q: Your fingers lie ____ to your wrist
A: Distal
Q: Your wrist lies ___ to your fingers
A: Proximal
Q: What term relates to the covering of an organ?
A: Visceral
Q: What term relates to the lining of a cavity?
A: Parietal
Q: What is the process resulting in the production of mature sperm and
oocytes?
A: Gametogenesis
Q: When a sperm and oocyte unite together, what is it called?
A: Zygote
Q: Most cells in the body (except germ cells) divide using which cellular
process?
A: Mitosis
Q: How many divisions are there in Mitosis?
A: 1
Q: How many chromosomes are present in a daughter cell of mitosis?
A: 46 chromosomes (diploid number)
Q: What mechanism do germ cells use to divide?
A: Meiosis
Q: How many divisions are there in Meiosis?
, A: 2
Q: How many chromosomes does each daughter cell of Meiosis end up with?
A: 23 chromosomes (haploid number)
Q: T/F: Chromosomes can have 1 or 2 strands?
A: True
Q: What do we call the individual strands of a chromosome?
A: Chromatid
Q: What is the embryological directional terms for "superior"; "inferior";
"anterior"; and "posterior"?
A: - Cranial
- Caudal
- Ventral
- Dorsal
Q: What is the First Meiotic division?
A: Paired homologous chromosomes separate into two daughter cells; each
chromosome consisting of 2 chromatids
Q: What is Second Meiotic Division?
A: Each chromosome splits at the centromere into two chromatids; each chromatic
going into a separate daughter cell
Q: What is the interchange of chromatid segments between homologous
chromosomes during the first meiotic division?
A: Crossover
Q: What is the failure of a pair of chromosomes to split during Meiosis?
CONCEPTS OF HUMAN EMBRYONIC DEVELOPMENT,
FERTILIZATION, AND EARLY PRENATAL GROWTH
Q: What period of development stems from 9-38 weeks?
A: Fetal Period
Q: What do we call a drug/agent that can cause abnormal development? Whats
an example?
A: Teratogen
Ex: Accutane
Q: What is the period of greatest sensitivity to teratogenesis for abnormal
development?
A: Embryonic Period
Q: What developmental period spans from 3-8 weeks?
A: Embryonic Period
Q: What is Prenatal; Perinatal; & Postnatal?
A: - Before birth
- Around time of birth
- After birth
Q: What is the plane that splits the body into anterior and posterior halves?
A: Coronal (Frontal) Plane
Q: What is the vertical plane that passes through the midline of the body,
dividing it into symmetrical right and left halves?
A: Median (Midsagittal Plane)
,Q: Your fingers lie ____ to your wrist
A: Distal
Q: Your wrist lies ___ to your fingers
A: Proximal
Q: What term relates to the covering of an organ?
A: Visceral
Q: What term relates to the lining of a cavity?
A: Parietal
Q: What is the process resulting in the production of mature sperm and
oocytes?
A: Gametogenesis
Q: When a sperm and oocyte unite together, what is it called?
A: Zygote
Q: Most cells in the body (except germ cells) divide using which cellular
process?
A: Mitosis
Q: How many divisions are there in Mitosis?
A: 1
Q: How many chromosomes are present in a daughter cell of mitosis?
A: 46 chromosomes (diploid number)
Q: What mechanism do germ cells use to divide?
A: Meiosis
Q: How many divisions are there in Meiosis?
, A: 2
Q: How many chromosomes does each daughter cell of Meiosis end up with?
A: 23 chromosomes (haploid number)
Q: T/F: Chromosomes can have 1 or 2 strands?
A: True
Q: What do we call the individual strands of a chromosome?
A: Chromatid
Q: What is the embryological directional terms for "superior"; "inferior";
"anterior"; and "posterior"?
A: - Cranial
- Caudal
- Ventral
- Dorsal
Q: What is the First Meiotic division?
A: Paired homologous chromosomes separate into two daughter cells; each
chromosome consisting of 2 chromatids
Q: What is Second Meiotic Division?
A: Each chromosome splits at the centromere into two chromatids; each chromatic
going into a separate daughter cell
Q: What is the interchange of chromatid segments between homologous
chromosomes during the first meiotic division?
A: Crossover
Q: What is the failure of a pair of chromosomes to split during Meiosis?
