Test 1 SG Flashcards
- What type of meiotic division does the primary oocyte stop during the prenatal period (prior to puberty)?
Prophase
The first polar body contains
23 chromosomes
- Development and proliferation of the notochord induces:
neural plate formation
- The notochordal process grows cranially from the primitive pit until it reaches the _________ and stops:
prechordial plate
- The oropharyngeal membrane contains mesoderm: T or F
Fasle
- Cloacal membrane eventually becomes the:
Anus
- Which produce testosterone in adolescent males?
Leydig
- After ovulation the secondary oocyte is surrounded by a layer of follicular cells called:
Corona radiata
- Oogonia are present in 21 year old women? T or F
False
- The first polar body is formed after the:
first meiotic division
- Ovarian follicular cells secrete mostly:
Estrogen
- The second polar body contains:
small amounts of cytoplasm
- According to Albertus Magnus, what controls conception?
Saturn
- A primary oocyte contains 22 autosomes and the following:
one x chromosome
- As the bilaminar disk becomes a trilaminar disk, epiblast cells migrate through the:
primitive groove
- Because of Aristotle’s teaching, French Noblemen had their left testicle removed to ensure:
they would have male offspring
- Neural crest cells are the premordium of:
Spinal ganglia
Fusion of neural folds form the
Neural tube
Fusion of lateral folds form
Brain
Notochord becomes part of the following in neonate
Vertebral bodies
If fertilization occurs in corpus lutea
Produces progesterone to support the pregnancy
Which hormone stimulates testosterone production in males
Lutenizing hormone (LH)
Each somite is innervated by how many spinal nerves
1
The cardiogenic area in the trilaminar disk is ____ to the oropharyngeal membrane
Cranial
The fluid filled cavities that develop in the lateral embryonic mesoderm are called
Celom
The muscels of the back are derived from what part of the somite
Epaxial part of myotome
One spermatid ultimately yields how many mature sperm
1
After fertilization, the zona pellucida becomes
Zona rxn
The inner cell mass of a blastomere becomes the
Future embryo
If pregnancy occurs, what phase of the menstral cycle does not occur?
Ischemic
The prechordial plate is a thickening of the cells on the cranial end of the ____ layer of the embryoblast
Hypoblast
As the notochord grows new cells are added to the caudal end
T or F
False
The neural plate invaginates beginning on day 18, this forms the
Neural groove
The neural crest cells are located between what and what
Neural tube and surface ectoderm
Each somite is associated with how many dermatomes
2
Epaxial muscles are innervated by what
Dorsal primary rami
The lateral body walls are formed from the ectoderm and what?
Somatopleure
During the initial stages of cardiac development, the atria are what to the ventricles
Inferior
Secondary villi have a core of what that develop blood vessels
Mesenchyme
Neural crest cells normally seperate from the overlying ectoderm
T or F
False
The notochord is what to the neural tube
Deep
Somites develop from what part of the mesoderm?
Paraxial
Which part of the somite becomes the axial skeleton
Sclerotome
The hypaxial portion of themyotome develops what muscles
Superficial neck
One oogonia can eventually become how many secondary oocytes
1
The corona radate surrounding an unfertilized secondary oocyte contains how mnay polar bodies
1
The synchytiotrophoblast produces what that helps to maintain the pregnancy?
HCG
Cell division that is occuring in the arm of a 20 y/o female is called meiosis
T or F
False
Meiosis produces a cell with how many chromosomes?
23
Gonadotropin releasing hormone is produced where
Hypothalamus
