All AP Biology Resources
Example Questions
Example Question #365 : Systems Physiology
Which of the following is not indicative of a menstrual disorder?
Heavy flow
Ovulation occurs midway through the cycle
Ovulation does not occur
Irregular cycles
Ovulation occurs midway through the cycle
Menstrual disorders include a heavy flow (menorrhagia), irregular cycles (amenorrhea, polymenorrhea, metrorhagia, and oligomenorrhea), and no ovulation (anovulation).
Example Question #1337 : Ap Biology
Which of the following is true regarding menstrual cycles in individuals living in the developing world?
Thicker cervical mucus
Age of menarche is later
Age of menarche is earlier
Higher hormone levels
Age of menarche is later
There are variations in the age of menarche by geographic location and environmental conditions. In developing countries, the age of menarche is later than in industrialized nations.
Example Question #1338 : Ap Biology
The endometrium is a membrane in which of the following female reproductive parts?
Cervix
Ovary
Vagina
Uterus
Uterus
The endometrium is a mucus membrane in the uterus of the female reproductive tract. The endometrium changes thickness based on hormone levels and is shed during the menstrual cycle if fertilization does not occur.
Example Question #61 : Understanding Other Reproductive Physiology
During which of the following pregnancy stages can the mother begin to feel fetal movement?
Second trimester
Third trimester
First trimester
Fetal movement cannot be felt during pregnancy
Second trimester
Human pregnancy can be divided into three trimesters, each categorized by different symptoms and stages of fetal development. During the second trimester of pregnancy, which occurs between 13 and 28 weeks, fetal movement can be felt. This is often called “quickening,” which is the stirring of the fetus.
Example Question #62 : Understanding Other Reproductive Physiology
Which of the following is indicative of the third trimester of pregnancy?
Implantation
Morning sickness
Fetal head descent
Initial fetal movement
Fetal head descent
The third trimester of pregnancy takes place during weeks 29 and 40. During this stage of pregnancy, women continue to gain weight, the fetus moves regularly, and the fetal head descends. The descent of the fetal head is important in easing maternal breathing and positioning the fetus for future delivery.
Example Question #63 : Understanding Other Reproductive Physiology
Which of the following best describes the theory behind the evolutionary adaptation of morning sickness in pregnant women?
Stimulates the pituitary gland
Prevents mothers from ingesting toxins
Prevents the mother from gaining weight
Exercises abdominal muscles
Prevents mothers from ingesting toxins
Morning sickness is the feeling of nausea and vomiting that occurs in many women during the first trimester of pregnancy. The physiological causes behind morning sickness include low blood sugar, an increased sensitivity to odors, and increased levels of estrogen and gonadotropin-releasing hormone. It is believed that morning sickness evolved in order to prevent the mother from ingesting toxins that could harm the developing fetus. This is supported by the fact that during the time morning sickness occurs, the fetus is highly sensitive to toxins.
Example Question #1342 : Ap Biology
Which of the following is not an indicator of pregnancy?
Back pain
Vaginal tearing
Increased urination
Swelling
Vaginal tearing
Common symptoms and indicators of pregnancy include swelling, increased urination, and back pain. Vaginal tearing is not an indicator or symptom of pregnancy, instead it is a possible occurrence during childbirth when the child exits the vagina.
Example Question #64 : Understanding Other Reproductive Physiology
Which of the following is true regarding the placenta?
The placenta develops only during the first trimester of pregnancy
The placenta is expelled two weeks after childbirth
The placenta develops from both the blastocyst and the maternal uterine lining
Placentas develop only from the blastocyst
The placenta develops from both the blastocyst and the maternal uterine lining
The placenta is a structure that allows for nutrient, waste, and oxygen exchange between the mother and developing fetus during pregnancy. It is connected the fetus by the umbilical cord and contains umbilical arteries and umbilical veins to facilitate exchange. The placenta is derived from the blastocyst and maternal uterine lining starting at implantation and develops throughout pregnancy. The placenta is expelled from the mother immediately after childbirth.
Example Question #1344 : Ap Biology
Which part of the developing blastocyst becomes the placenta in mammals?
Yolk
Embryoblast
Blastocoel
Trophoblast
Trophoblast
The trophoblast is a layer of cells that surround the blastocyst. The trophoblast becomes the outer layer of the placenta and further differentiates into syncytiotrophoblast and cytotrophoblast cells that contribute to placentation.
Example Question #65 : Understanding Other Reproductive Physiology
Which of the following choices connects the developing fetus to the maternal placenta?
Amniotic sac
Endometrial villi
Umbilical cord
Fetal villi
Umbilical cord
During fetal development, the umbilical cord is a structure that connects the fetus to the maternal placenta. The umbilical cord contains umbilical arteries and the umbilical vein, allowing oxygen, nutrient, and waste exchange between the mother and fetus. It develops from the yolk sac and allantois in the fifth week of development and is clamped or cut following childbirth.
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