Lecture 4

Question 1

Gastrulation (week 2)

Answer 1

Formation of the 3 germ layers by migration and differentiation of blastula cells

Question 2

Three germ layers in gastrulation

Answer 2

1. Ectoderm: skin, hair and nervous system
2. Mesoderm: muscles and bones
3. Endoderm: most other organs

Question 3

Neurulation (week 3)

Answer 3

Formation of the neural plate, neural groove and neural tube in the ectoderm

Question 4

First signs of the brain in embryo

Answer 4

Week 4

Question 5

Eye formation embryo

Answer 5

Week 4 it starts with thickening of the ectoderm and at week 8 the eye is formed with rods and cones

Question 6

Ear development embryo

Answer 6

Week 5 to week 8

Question 7

Organogenesis finished at what week

Answer 7

Week 8

Question 8

Similarities in brain networks between newborns and adults

Answer 8

Sensory and motor networks are similar

Networks associated with higher cognitive functions are dissimilar

Question 9

Touch development

Answer 9

Head (week 8) to hands (week 10) to feet (week 12)

Question 10

Rooting reflex

Answer 10

First moving away from touch and later towards it

Question 11

Taste and smell development

Answer 11

Starting at 16 weeks

Question 12

Optic nerve development

Answer 12

Starting at week 8 and is finished at week 28

Question 13

Factors that negatively impact development of fetus

Answer 13

1. Age of parents
2. Nutrition, drugs, alcohol
3. Stress
4. Mental disorders & medication
5. Infections

Question 14

Fetal alcohol syndrome symptoms

Answer 14

1. Minor facial abnormalities
2. Growth delay
3. Heart defects
4. Mental disabilities
5. Hyperactivity and repetitive behavior

Question 15

Smoking before and during pregnancy problems

Answer 15

1. Fertility
2. Increased risk of miscarriage
3. Delay of growth
4. Placenta problems
5. Preterm birth
6. Heart defects

Question 16

Development of auditory system

Answer 16

Starts at 6 weeks and ends at 24 weeks