In humans:
A)up to 42% of all synapses in the cortex may be pruned.
B)synapses that are seldom used become strengthened.
C)synaptogenesis begins at birth.
D)the number of synapses is relatively constant from birth until age 8.

Question

Quizplus · Accepted Answer

Studies have shown that up to 42% of synapses in the cortex may be pruned during development in humans, particularly during adolescence. This pruning process helps refine neural connections and optimize brain function.

Answer: B
 Synaptic plasticity is a key mechanism in learning and memory, and synapses that are frequently used become stronger, while those that are seldom used may weaken or be eliminated.

Answer: C
 Synaptogenesis, or the formation of new synapses, begins at birth and continues throughout life. During early childhood, synaptogenesis is particularly rapid, with the brain establishing a vast number of neural connections.

Answer: D
 The number of synapses in the brain is not constant throughout development, and in fact, peaks during early childhood before gradually declining. By age 8, the brain has already undergone significant synaptic pruning and is approaching the adult number of synapses.

In Humans