Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

23 Cards in this Set

  • Front
  • Back
The primary oocyte and primary spermatocyte contain ___ chromosomes.
The secondary oocyte and secondary spermatocyte contain ___ chromosomes.
Gametes are formed by the process of ___.
Cleavage cell division continues to form a ___ (mass of 16 cells).
The inner cell mass is called ___.
The outer cell mass is called ___.
The ___ forms the embryo and amnion.
The ___ forms the placenta and chorion.
The placenta contains how many veins and arteries?
1 large vein and 2 small arteries
This hormone preserves the corpus luteum and its progesterone production so that the endometrial lining of the uterus is maintained.
This hormone modulates fetal and maternal metabolism, participates in the development of maternal breasts for lactation, and decreases maternal insulin activity to increase its availability for fetal nutrition.
human placental lactogen
This hormone causes enlargement of a woman's breasts, uterus, and external genitalia; stimulates myometrial contraction.
This hormone maintains the endometrium, decreases the contractility of the uterus, stimulates maternal metabolism.
This hormone acts synergystically with progesterone to maintain pregnancy, causes relaxation of the pelvic ligaments, softens the cervix in preparation for birth.
The preembryonic stage is from ___ through the ___ week.
fertilization; 2nd
The embryonic stage is from ___ week through the ___ week.
2nd; 8th
The fetal stage is from the end of the ___ week until ___.
8th; birth
___ connects the umbilical vein to the inferior vena cava.
ductus venosus
___ connects the main pulmonary artery to the aorta.
ductus arteriosus
Humans have ___ paired chromosomes that are found in all cells of the body, except the ovum and sperm cells, which have just ___ chromsomes.
Klinefelter syndrome is a chromosomal disorder involving an extra Xchromosome (XXY)
Turner syndrome is also known as ___.
monosomy X
In this syndrome, the female is typically becomes the carrier and will be mildly affected. The male who receives the X chromosome that has a fragile site will exhibit the full effects of the syndrome.
fragile X