Biology
structures that secrete hormones important in the maintenance of pregnancy
Placenta
Put the steps involved in maintaining the uterine lining in order.
-Trophoblast cells secrete hCG – hCG maintains corpus luteum – Corpus continues to secrete estrogen and Progesterone – E and P promote growth, development, and maintenance.
Secretion of human chorionic gonadotropin (hCG) occurs during what time frame during pregnancy?
Secretion of human chorionic gonadotropin (hCG) occurs during what time frame during pregnancy? During early pregnancy, through the fourth month
What group of cells within a zygote are involved in the formation of the placenta?
What group of cells within a zygote are involved in the formation of the placenta? Trophoblast
Upon the mingling of the pronuclei in a fertilized oocyte, the cell is now called
Upon the mingling of the pronuclei in a fertilized oocyte, the cell is now called Zygote
How many chromosomes are contained in a secondary oocyte prior to fertilization?
How many chromosomes are contained in a secondary oocyte prior to fertilization? 23
What term describes the union of a sperm cell with a secondary oocyte?
What term describes the union of a sperm cell with a secondary oocyte? ertilization
What term describes an increase in the size of a structure due to increase in the number and size of cells?
What term describes an increase in the size of a structure due to increase in the number and size of cells? Growth
Put in correct order the images showing the early stages of embryonic development.
Put in correct order the images showing the early stages of embryonic development.
List, in order, the layers through which a sperm cell must penetrate in order to fertilize an oocyte.
List, in order, the layers through which a sperm cell must penetrate in order to fertilize an oocyte.