Multiple Choice Questions
 

1.  The period from conception until birth is  
A.  the prenatal period.
B.  the germinal period.
C.  the embryonic period.
D.  the fetal period.
E.  the conceptual period.

2.  The prenatal period during which the major organ systems form is the    
A.  fetal period.
B.  germinal period.
C.  embryonic period.
D.  neonatal period.

3.  What event separates childhood from adolescence?  
A.  puberty
B.  infancy
C.  formation of germ layers
D.  beginning to walk

4.  Germ layers form during the ____ period while organ systems mature during the ____ period.  
A.  embryonic; fetal
B.  prenatal; neonatal
C.  germinal; embryonic
D.  germinal; fetal
E.  fetal; germinal

5.  The clinical age of the unborn child is calculated from  
A.  ovulation.
B.  conception.
C.  the last menstrual period.
D.  fourteen days after the last menstrual period.
E.  fourteen days before the last menstrual period.

6.  Developmental events are calculated from  
A.  ovulation.
B.  conception.
C.  the last menstrual period.
D.  fourteen days after the last menstrual period.
E.  fourteen days before the last menstrual period.

7.  Fusion of the male and female pronuclei  
A.  results in an oocyte forming.
B.  restores the diploid number of chromosomes.
C.  occurs before ovulation.
D.  results in a haploid cell forming.
E.  results in a total of 23 chromosomes.

8.  Depolarization of the oocyte plasma membrane occurs when the first sperm attaches to the integrin ?6?1. This is called the  
A.  slow block to polyspermy.
B.  acrosomal reaction.
C.  fast block to polyspermy.
D.  fertilization.
E.  spermiogenesis.

9.  Fusion of the male and female pronuclei forms the  
A.  blastocyst.
B.  morula.
C.  zygote.
D.  gastrula.
E.  trophoblast.

10.  If the zygote splits into two separate cells,  
A.  identical twins result.
B.  fraternal twins result.
C.  dizygotic twinning occurs.
D.  both cells die.
E.  paternal twins result.