Human Development Practice questions
Question 1 The prenatal period lasts _____. A) 266 days B) 36 weeks C) 9 lunar months D) 10 lunar months
Question 2 Which of the following is true of blastomeres? A) Found in an embryo B) Have a zona pellucida C) Divide by cleavage D) Are produced by meiosis
Question 3 Which of these is the first to develop? A) Blastocyst B) Embryo C) morula D) Fetus
Question 4 Which of these is NOT true of implantation? A) Involves a blastocyst B) Is in the uterine tube C) Has cells that produce HCG D) Occurs by sixth day
Question 5 In the process of in vitro fertilization, the woman is given _____ to induce follicle development. A) HCG B) Human menopausal gonadotropin C) Progesterone D) FSH
Question 6 The embryonic period lasts from the second week through _____ week. A) Third B) Fourth C) eighth D) Twelfth
Question 7 All of these arise from mesoderm except which one? A) Muscle B) Brain C) Kidney D) Blood
Question 8 Which of these is NOT an endodermal derivative? A) Urinary bladder B) Urethra C) Lining of stomach D) Epidermis
Question 9 What prevents the maternal and embryonic blood cells from mixing? A) Chorionic villi B) Placental membrane C) Lacunae D) Trophoblastic
Question 10 When would drugs or radiation produce the greatest harm? A) Early fetus B) In the ninth week C) Fourth week D) Late pregnancy
Question 11 When will the embryo take on a human appearance? A) Eighth week B) Fourth week C) Second fetal month D) Sixth week
Question 12 Which of these is a maternal component? A) Chorionic B) Amnion C) decidua basalis D) umbilical cord
When does the amnion first appear? A) first week B) second week C) fifth week D) sixth week
What is the origin of fetal blood cells? A) chorion B) amnion C) yolk sac D) allantois
What is the major cell process in the fetus? A) differentiation B) meiosis C) mitosis D) cleavage
When can the male and female organs be distinguished first? A) eighth week B) 10th week C) twelfth week D) fourth month
Which of the following is NOT true at full term? A) testes begin to descend B) fingernails are present C) vertex position is evident D) fetus is 50 cm long
The main factor that may NOT allow a 24 week fetus to survive independently is the _____. A) strength of the heart B) nervous system maturation C) lack of surfactant secretion D) ability to move
The ductus venosus transports blood to the _____. A) placenta B) heart C) liver D) vena cava
The foramen ovale allows blood from the right atrium to enter the _____.
A) left ventricle
B) left atrium
D) right ventricle
Large amounts of blood do NOT enter the fetal lungs because their _____.
A) pressure is too high
B) development is immature
C) resistance is high
D) arteries are closed
The ductus arteriosus allows blood to flow from the pulmonary trunk to the _____.
D) right atrium
The umbilical arteries are branches of the _____.
A) ductus venosus
B) inferior vena cava
C) internal iliac arteries
D) external iliac arteries
Which of these has the greatest oxygen content?
A) umbilical arteries
B) umbilical vein
C) fetal aorta