BIO 351 EXAM 2 REVIEW QUESTIONS WITH CORRECT ANSWERS| LATEST UPDATE
GUARANTEED SUCCESS
All the cells of the embryo proper (all the cells in your body now) derive from which of the
following cells? Epiblast
Which of the following is the epiblast? Refer to image on question 4 on Sep. 17th lecture
questions,
Answer: C
Which of the following is the anterior visceral endoderm? C
In the mammalian embryo, which structure is essential to set up the anterior-posterior axis?
Anterior visceral endoderm
Inner cell mass determines the proximal-distal (dorsal-ventral) axis
Node key to forming left-right asymmetry
sperm entry site determines the initial axis (anima-vegetal)
, primitive streak forms after AVE
The neural tube forms from the folding of the neural plate. Which region of the neural plate
fuses together to form the dorsal neural tube? Refer to Q1 from 09/24 clicker question.
Answer: C
The neural tube forms from the folding of the neural plate. Which region of the neural tube is
the first to close? The middle
A 25 year-old woman who is pregnant for the first time undergoes amniocentesis during the
25th week of pregnancy. The testing reveals an increased level of acetylcholinesterase in the
amniotic fluid. Acetylcholinesterase is normally produced in the CNS and cannot cross the blood
brain barrier. This test suggests which of the following fetal abnormalities? Anencephaly,
the neural tube is open in the head and exposed to amniotic fluid.
Gastrulation defect the embryo would not survive to 25 weeks without mesoderm formed
during gastrulation
Spinal bifida occulta open spinal cord
The neural tube is regionalized by developmental gene regulation. Which of the following
correctly matches the gene and specified region? Shh- ventralizing the neural tube
GUARANTEED SUCCESS
All the cells of the embryo proper (all the cells in your body now) derive from which of the
following cells? Epiblast
Which of the following is the epiblast? Refer to image on question 4 on Sep. 17th lecture
questions,
Answer: C
Which of the following is the anterior visceral endoderm? C
In the mammalian embryo, which structure is essential to set up the anterior-posterior axis?
Anterior visceral endoderm
Inner cell mass determines the proximal-distal (dorsal-ventral) axis
Node key to forming left-right asymmetry
sperm entry site determines the initial axis (anima-vegetal)
, primitive streak forms after AVE
The neural tube forms from the folding of the neural plate. Which region of the neural plate
fuses together to form the dorsal neural tube? Refer to Q1 from 09/24 clicker question.
Answer: C
The neural tube forms from the folding of the neural plate. Which region of the neural tube is
the first to close? The middle
A 25 year-old woman who is pregnant for the first time undergoes amniocentesis during the
25th week of pregnancy. The testing reveals an increased level of acetylcholinesterase in the
amniotic fluid. Acetylcholinesterase is normally produced in the CNS and cannot cross the blood
brain barrier. This test suggests which of the following fetal abnormalities? Anencephaly,
the neural tube is open in the head and exposed to amniotic fluid.
Gastrulation defect the embryo would not survive to 25 weeks without mesoderm formed
during gastrulation
Spinal bifida occulta open spinal cord
The neural tube is regionalized by developmental gene regulation. Which of the following
correctly matches the gene and specified region? Shh- ventralizing the neural tube
