Question 1
Approximately how many neurons are created during the most rapid phase of neuron development in the second trimester?
◦ 1,000 per minute
◦ 5,000 per minute
◦ 100,000 per minute
◦ 250,000 per minute
Question 2
As it relates to brain development during adolescence, what does the phrase
use it or lose it imply?
◦ The brain selectively prunes neurons and connections that aren't being used.
◦ The brain prunes connections to muscles that are not being regularly exercised.
◦ Adolescent brain development slows down and is set on standby until it is needed.
◦ Mental activities such as problem solving and completing mathematical computations will be forgotten if not practiced daily.
Prenatal development in humans.
Photograph illustrating the development of a fetus
Sheep brain Sagittal view
Sheep Brain Dissection
Brain
The Blood–Brain Barrier