22 Questions
What is the result of the fusion of the sperm and oocyte nuclei during fertilization?
A cell with half genetic material from each parent
What is the purpose of the acrosomal reaction during fertilization?
To release enzymes to penetrate the zona pellucida
What is the term for the process by which the fertilized oocyte becomes an impenetrable barrier to prevent polyspermy?
Fertilization membrane formation
Approximately what percentage of blastocysts fail to implant in the uterus during the pre-embryonic stage?
50-75%
What type of transport is required for the transfer of amino acids and iron across the placenta?
Active transport
What is the function of the amnion during embryonic development?
To surround the embryo with fluid for protection
During which weeks does the placenta take over the endocrine function from the corpus luteum?
Weeks 12-17
During what week does the conceptus reach the uterus and implant?
Week 2
What is the primary function of relaxin during pregnancy?
Loosening the pelvis and dilating the cervix
What is the term for the formation of a cylindrical embryo from a flat sheet of cells during embryogenesis?
Embryonic folding
What is the primary function of the chorion during embryonic development?
To surround all other embryonic membranes
What is the recommended additional daily caloric intake for a pregnant woman during the 2nd and 3rd trimesters?
300 calories
What is the physiological change that occurs in the mother's body about 2 days before labor?
The expulsion of a plug of mucus covering the cervix
What is the term for the process by which the fertilized oocyte undergoes meiosis and releases a polar body?
Meiosis
What is the primary function of thyrotropin during pregnancy?
Increasing production of thyroid hormone
When is the placenta fully developed and functional?
Week 12
What is the primary function of the foramen ovale and ductus arterioles in the fetus?
To bypass the pulmonary circulation
What is the main difference between colostrum and milk produced after the first 72 hours?
Colostrum has a higher concentration of immunoglobulins
What is the term for the mixture of alleles that will show in an individual's phenotype?
Codominance
What happens to the prolactin levels over time, even with constant breastfeeding?
They decrease
What is the term for the process by which the uterus returns to its pre-pregnancy size?
Involution
What is the term for someone who has a recessive gene that can be passed on to their offspring?
Carrier
Learn about the process of fertilization, where sperm and oocyte combine to form a zygote, and how the genetic material from both parents is merged. Discover the obstacles that sperm face and how they survive to reach the egg.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
