Neurotrophins
A) are life-preserving chemicals for neurons.
B) are supplied to neurons by their synaptic targets.
C) promote neuron death.
D) both A and B
E) both B and C
Question 2
Between birth and adulthood, the size of the human brain
A) doubles.
B) quadruples.
C) actually declines.
D) stays about the same although the skull grows.
E) increases 10 fold.