What is the small gap between two neurons called?

A synapse (The text says 'Between them lies a microscopic gap called a synapse.')

The passage suggests that a single thought is

the result of many neurons signaling together (The text says a smooth thought is 'really a vast storm of these signals' across billions of neurons.)

In this passage, 'intricate' most nearly means

complex and detailed (An 'intricate web of connections' refers to a complex, detailed network.)

Which statement best captures the main idea of the passage?

The brain uses both electrical and chemical signals to pass messages between billions of neurons (The passage describes electrical pulses traveling inside neurons and chemical messengers crossing the synapse between them: a "blend of electricity and chemistry" that lets billions of cells coordinate.)

Messages in the Brain: Level 4 Reading Comprehension Questions

Every thought, memory, and movement begins as a tiny electrical signal traveling through the brain. The brain contains roughly eighty-six billion cells called neurons, each one shaped like a tree with many branching arms. A neuron receives signals through its branches, and when enough of them arrive, the cell fires a pulse of electricity down a long fiber toward its neighbors.

But neurons do not actually touch. Between them lies a microscopic gap called a synapse. To cross it, the electrical signal triggers the release of chemical messengers that drift across the gap and pass the message along.

This blend of electricity and chemistry lets billions of neurons coordinate in fractions of a second. What we experience as a single smooth thought is really a vast storm of these signals racing through an intricate web of connections, many of them strengthened or weakened by what we learn.

Comprehension questions