22 Questions
Which of the following substances requires active transport across the placenta?
Amino acids
During which weeks does the placenta take over the endocrine function from the corpus luteum?
12-17
What is the primary function of relaxin during pregnancy?
Loosening the pelvis and dilating the cervix
How many calories per day should a pregnant woman increase her intake during the 2nd and 3rd trimesters?
300
What is the name of the plug of mucus that covers the cervix and is expelled along with a small amount of blood before labor?
Bloody show
How many stages are there in the process of childbirth?
4
What is the primary function of the foramen ovale and ductus arterioles in the infant's circulation?
To close after birth and allow for separate circulation
What is the primary function of prolactin in lactation?
To establish and maintain the milk supply
What is the genetic term for the expression of a gene's effect?
Phenotype
What is the term for an individual who carries a recessive gene that can be passed on to their offspring?
Carrier
What is the primary function of brown fat in the infant?
To regulate body temperature
What is the term for the first milk produced by the mother, rich in immunoglobulins?
Colostrum
During fertilization, what is the purpose of the acrosomal reaction?
To release enzymes to penetrate the corona radiata and zona pellucida
What is the main function of the zona pellucida?
To block the entry of multiple sperm
What is the result of fertilization, in terms of the genetic material of the zygote?
The zygote has half genetic material from the mother and half from the father
What is the purpose of the fertilization membrane?
To block the entry of additional sperm after fertilization
What is the term for the process by which the sperm penetrates the layers surrounding the oocyte?
Penetration
What is the term for the failure of a blastocyst to implant in the uterine wall?
Implantation failure
What is the function of the yolk sac?
To provide nourishment to the embryo until the placenta is functional
What is the term for the process by which the embryonic cells organize into three layers?
Embryogenesis
What is the function of the placenta in terms of gas exchange?
To facilitate the exchange of gases and waste between the embryo and mother
At what stage is the placenta fully developed?
By the end of week 12
Learn about the process of fertilization, where a sperm and an oocyte combine to form a new cell called a zygote. Discover how the sperm navigate through the female reproductive system, overcoming obstacles such as acidity and immune cells, and how the genetic material from both parents is combined. Test your knowledge of this crucial stage in human development!
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