Development

Question 1

NEURAL PLATE

Answer 1

A small patch of ectodermal tissue on the dorsal surface of the vertebrate embryo, from which the neural groove, the neural tube, and, ultimately, the mature nervous system develop.

Question 2

NEURAL TUBE

Answer 2

The tube that is formed in the vertebrate embryo when the edges of the neural groove fuse and that develops into the central nervous system.

Question 3

TOTIPOTENT

Answer 3

Capable of developing into any type of mature body cell.

Question 4

MULTIPOTENT

Answer 4

Capable of developing into a limited number of types of mature body cell.

Question 5

NEURAL PROLIFERATION

Answer 5

The rapid increase in the number of neurons that follows the formation of the neural tube.

Question 6

MIGRATION

Answer 6

The movement of cells from their site of creation in the ventricular zone of the neural tube to their ultimate location in the mature nervous system.

Question 7

GROWTH CONE

Answer 7

Amoebalike structure at the tip of each growing axon or dendrite that guides growth to the appropriate target.

Question 8

SYNAPTOGENESIS

Answer 8

The formation of new synapses.

Question 9

NECROSIS

Answer 9

Passive cell death, which is characterized by inflammation.

Question 10

APOPTOSIS

Answer 10

Cell death that is actively induced by genetic programs; programmed cell death.

Question 11

CRITICAL PERIOD

Answer 11

A period during development in which a particular experience must occur for it to influence the course of subsequent development.

Question 12

SENSITIVE PERIOD

Answer 12

The period during the development of a particular trait, usually early in life, when a particular experience is likely to change the course of that development.

Question 13

NEUROGENESIS

Answer 13

The growth of new neurons.