What are a series of strong, rhythmic contractions of the uterus that brings the birth of a child called?
Answer: labor
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Human Biology
- What are the three stages of labor?
- Which hormone plays a key role in inducing labor?
- What finger-like part of the placenta absorbs nutrients, oxygen, and antibodies from the mother's blood and passes them to the embryo.
- What is the name of the organ that provides nourishment and oxygen to the embryo and helps dispose metabolic waste?
- What is the outer embryonic cell layer of a blastocyst called that starts to form part of the placenta?
- A blastocyst contains an inner cell mass made of _________, which have the potential to give rise to every type of cell in the body.
- Gestation is measured as 40 weeks from the ______ of the last menstrual cycle in female humans.
- What is the carrying of a developing young within the female reproductive tract called?
- What is the innermost layer that becomes the lining of the digestive tract during gastrulation called?
- What is the middle layer that forms the heart, kidneys and muscles during gastrulation called?
- What is the outer layer that forms the nervous system and skin during gastrulation called?
- What occurs about 9 days after conception when the embryo undergoes an organized migration of cells (which result in an ectoderm, mesoderm, and endoderm)?
- What forms 6-7 days after fertilization and consists of a fluid-filled ball with around 100 cells and an inner cell mass?
- Development begins with ___________, a series of rapid cell divisions that results in a multicellular ball, but causes no major cellular growth.
- Embryonic development begins with _____________, the union of sperm and egg to form a zygote.
- What type of STD cannot be cured, only controlled with medication?
- What is the most common bacterial STD?
- What is a contagious disease spread by sexual contact caused by bacteria, protozoans, or fungi?
- Synthetic ______ and ________ tricks brain into thinking you're pregnant and prevents ovulation.
- The RU-486 hormonal birth control pill induces ______.
- This hormonal birth control method is 75% effective at preventing pregnancy when taken within three days of intercourse.
- What type of barrier method contraception involves a sheath usually made of latex that fits over the penis or within the vagina?
- What type of barrier method contraception involves a dome shaped rubber cap that covers the cervix?
- This method of contraception prevents a sperm from meeting an egg.
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