Reference no: EM133296075

Question 1. Styles Early pregnancy tests used antibodies to detect the presence of human chorionic gonadotropin [hCG) in maternal urine. Explain how hCG, produced by the chorion, gets in maternal urine.

Question 2. Human embryonic stem cell research uses stem cells cultured from the blastula. These cells are pluripotent, meaning that these stem cells can develop many different types of human cells. Identify the part of the blastula that they are using and explain your choice.

Question 3. During an ultrasonography, the doctor observes that all four chambers of the fetal heart are developed normally and that blood can be observed passing from the right atrium to the left atrium. Explain why it is normal for blood to pass from the right to left atrium in the fetal heart.

Question 4. Placenta previa (previa = before or in front of) is a condition in which either part or the entire placenta implants in the inferior part of the uterus near the cervix. Explain why this can cause spontaneous abortion or premature birth.