Intro to B&B

Question 1

What is the name of the zygote division process?

Answer 1

Cleavage

Question 2

At what stage do the morula and blastocyst form?

Answer 2

Germinal stage

Question 3

At what point does the embryonic stage begin?

Answer 3

Following implantation

Question 4

What is the process called that forms the embryonic disk?

Answer 4

Gastrulation

Question 5

Name the three parts of the embryonic disk?

Answer 5

Ectoderm, Mesoderm and Endoderm

Question 6

How is the neural tube formed?

Answer 6

1. The embryonic disk develops unevenly
2. Part of the ectorderm at the back of the embryo thickens and forms a plate
3. The edges of the plate form ridges that curl towards each other
4. The ectoderm folds in on itself and zips up

Question 7

By day 28, the neural tube has closed and the front has developed into three interconnected chambers. What do these chambers become?

Answer 7

Forebrain, midbrain and the hindbrain

Question 8

Name 2 neural tube defects

Answer 8

1. Spina bifida
2. Anancephaly

Question 9

What causes Spina bifida?

Answer 9

failure of the closure of the neural tube, at the spinal cord level

Question 10

What are the 2 main symptoms of Spina bifida?

Answer 10

Paralysis and limb deformation

Question 11

What Vitamin can help prevent Spina Bifida during pregnancy?

Answer 11

B9

Question 12

What causes anencephaly? and what is the result of this?

Answer 12

Failure of closure of he neural tube, generally leads to still borns