Unit 4 Introduction

Question 1

number of neurons and synaptic connections

Answer 1

100 billion neurons in the human brain

each neuron may be connected to up to 10,000 other neurons

1,000 trillion synaptic connections

Question 2

adaptive responses

Answer 2

the effect of many drugs takes weeks to develop

⇒ caused by long-term changes rather than the immediate effect of the drug on its target