The Synapse and Nervous System Quiz

What is the meeting point between two neurons called?

• Dendrite

• Synapse

• Axon

• Neurotransmitter

How many synapses are there in the human brain approximately?

• 1 trillion

• 1 billion

• 1 million

• 100 billion

What is the main advantage of chemical synapses over electrical synapses?

• Direct connection between cells

• Faster transmission

• Easier to control

• More precise and selective

What is the tiny gap between two neurons called?

• Synaptic cleft or Gap Junction

• Dendrite gap

• Neurotransmitter gap

• Axon gap or Terminal Cleft

Which neurotransmitter influences emotion and attention?

• Endorphin

• Norepinephrine

• Serotonin

• Dopamine

What happens to neurotransmitters after they deliver their message?

• They diffuse back and are re-absorbed

• They get recycled

• All of the above

• They degrade

What does cocaine do to neurotransmitters in the brain?

• Blocks reuptake

• Decreases release

• Increases production

• None of the above

What is the main function of inhibitory neurotransmitters?

• Increase heart rate

• Depolarize the postsynaptic neuron

• Hyperpolarize the postsynaptic neuron

• Trigger fight or flight response

What is the role of voltage-gated calcium channels in a neuron?

• Activate sodium and potassium channels

• Fuse with the cell membrane

• Release neurotransmitters

• Open and release calcium into the cytoplasm

What is the main purpose of synapses in the nervous system?

• To transmit signals between neurons

• To regulate hormone levels

• To control muscle movement

• To store memories