9.1-9.4

Question 1

What are embryonic stem cells?

Answer 1

Have unlimited capacity for self renewal and are pluripotent (have ability to develop into many, but not all, classes of body cells)

Question 2

Describe the development of the neural tube

Answer 2

The neural plate folds to form the neural groove

The neural groove fuses to form the neural tube

Question 3

Label the sections of the brain that develop out of the neural tube

Answer 3

A. Forebrain
B. Midbrain
C. Hindbrain

Question 4

What is important about the ventricular zone during neural proliferation in the neural tube?

Answer 4

This is the region adjacent to the ventricle (fluid filled center of tube) where most cell division occurs

Question 5

What are growth cones?

Answer 5

An amoebalike structure that grows at the tip of an axon or dendrite

Question 6

What are neurotrophins?

Answer 6

Life preserving chemicals for neurons that are supplied by synaptic targets

Question 7

Which two areas of the adult mammal brain that have shown substantial evidence of neural growth

Answer 7

Hippocampus

Olfactory Bulbs

Question 8

List the 5 phases of neurodevelopment

Answer 8

1. Induction of the neural plate
2. Neural proliferation
3. Migration and Aggregation
4. Axon growth and synapse formation
5. Neuron death and synapse rearrangement