Lecture 3A

Question 1

Nerve cell, transmits information

Answer 1

Neuron

Question 2

Branch that carries messages away form the neuron

Answer 2

Axon

Question 3

Branch that receives messages form axons of other cells

Answer 3

Dendrite

Question 4

Gap where axon of one neurons meets the dendrite of another

Answer 4

Synapse

Question 5

Sheath of fatty cells that insulates axons- speeds the transmission of nerve impulses

Answer 5

Myelin

Question 6

What increase in brain development?

Answer 6

synapses, myelination, axons, dendrites

Question 7

Proliferation of neurons prenatally, followed by neuronal death

Answer 7

Neurogenesis

Question 8

Proliferation of cortex begins at birth, followed by pruning of synapses which are not used

Answer 8

Synaptogenesis

Question 9

Involuntary, inflexible, stimulus specific actions

Answer 9

reflexes

Question 10

What are some examples of infant reflexes?

Answer 10

Sucking, rooting, palmar grasping, stepping, crawling, mororeflex

Question 11

Head/neck control

Answer 11

0-2 months

Question 12

hold head with neck

Answer 12

1 month

Question 13

able to roll over, sit with support of lower back

Answer 13

2-4 months

Question 14

end of ___ month; able to lift chest off crib

Answer 14

2nd

Question 15

sits independently

Answer 15

4-6 months

Question 16

pulls self to stand hand and knees crawling, begin to use thumb in opposition to finger

Answer 16

6-10 months

Question 17

stands independently, walking

Answer 17

10-14 months

Question 18

shift one leg to other

Answer 18

controlled falling

Question 19

What accounts for the growth of the brain?

Answer 19

Increase in axon, synapses, myelination, axons

Question 20

When does neurogenesis occur?

Answer 20

prenatally

Question 21

When does synaptogenesis occur?

Answer 21

postnatally

Question 22

What is the cause of neuronal death?

Answer 22

Over create prenatally to have enough during development. Over create to have enough brain sources just in case

Question 23

What is the cause of synaptic pruning?

Answer 23

Not using the synapses