test 2

Question 1

morula

Answer 1

a mass of 12-16 cells that travels down the Fallopian tube into the uterus

Question 2

blastula/blastocyte

Answer 2

a hallow ball of about 150 cells, implanting onto the uterine wall, then fully becomes imbedded into the wall

Question 3

Which cell layer does the nervous system develop from?

Answer 3

ectoderm

Question 4

neural plate

Answer 4

becomes neural tube and the neural crest cells

Question 5

neural tube

Answer 5

becomes CNS, brain and spinal cord

Question 6

neural crest cells

Answer 6

becomes PNS

Question 7

what Is anencephaly?

Answer 7

failure of anterior tube to close, fatal

Question 8

spina bifida

Answer 8

failure of posterior (bottom) tube to close

Question 9

neuron proliferation

Answer 9

making of new neurons, 50,000-200,000 per second, from wk 6-17

Question 10

migration

Answer 10

neurons move to specific parts of the central brain, influenced by genetics and biochemical environment. then gets a function

Question 11

differentiation

Answer 11

transformation of cells, change based of new function or where they land. communicate with other neurons

Question 12

synaptogenesis

Answer 12

-forming functional connections
-growing synapses
-increases rapidly after birth
-young children have many more then adults

Question 13

myelination

Answer 13

-sheath formed on neuron in fetal period to speed transmission
-third trimester
-continues through early adulthood

Question 14

how do neurons migrate?

Answer 14

they attach themselves to strands of glial fiber then slowly progress along the surface of the fiber

Question 15

what happens in the nervous system during the 3rd trimester and the first 1-2 years of life?

Answer 15

the fetus gains weight and brain grows, the nervous system becomes more organized, more brain activity

Question 16

pruning

Answer 16

-decrease in number of connections and number of neurons
-only keep what you use
-customized to your environment

Question 17

age of viability

Answer 17

when the fetus has a chance of survival outside the womb

Question 18

when does survivability reach 50%?

Answer 18

at 24 weeks

Question 19

how would you characterize the adolescent brain?

Answer 19

-increase in dopamine neurotransmitter due to hormonal influence
-reward orientated
-nucleus accumbent
-myleination and maturation of PFC not complete until early adulthood
-lack of impulse control and planning

Question 20

risky behaviors in adolescence

Answer 20

drinking alcohol, sex, fights, drinking and driving, smoking

Question 21

risky behaviors in adolescence

Answer 21

drinking alcohol, sex, fights, drinking and driving, smoking

Question 22

neuroplasticity

Answer 22

adaptability, change, rewiring or reorganization, response to experience

Question 23

neuroplasticity

Answer 23

adaptability, change, rewiring or reorganization, response to experience

Question 24

results of Rosenzweig and greenoughs experiments

Answer 24

rats develop more synaptic connections in their environment

Question 25

epigenetics

Answer 25

study of how your behaviors and environment can cause changes that affect the way your genes work

Question 26

quiet/ deep sleep

Answer 26

peaceful no facial movements

Question 27

active/ light sleep

Answer 27

rem sleep highest % of sleep noisy baby process what has happened into brain

Question 28

drowsy

Answer 28

eyes open and close glossy eyes interventions to return to sleep bouncing

Question 29

quiet alert

Answer 29

wide eyes learn the most and take in info see hear and suck

Question 30

active alert

Answer 30

most active legs and arms move most engage with baby but shouldnt sensitive to external and internal stimuli work to get baby back to calm

Question 31

crying

Answer 31

direct communication for help active interventions

Question 32

which sleep stage is associated with REM sleep?

Answer 32

active sleep

Question 33

why is REM sleep important to babies?

Answer 33

serves to build brain and strengthen synapse to connect neurons