Neural Communication

What is the basic structural unit of the nervous system?

• Synapse

• Axon

• Neuron

• Dendrite

Which part of the neuron receives signals from other neurons?

• Synapse

• Axon

• Dendrites

• Cell body

What is the function of neurotransmitters in neural communication?

• Neurotransmitters regulate heart rate in the body.

• Neurotransmitters store memories in the brain.

• Neurotransmitters facilitate the transmission of signals between neurons.

• Neurotransmitters control blood sugar levels.

Name a neurotransmitter associated with emotions, learning, and attention.

• dopamine

• serotonin

• acetylcholine

• endorphins

What is the gap between two neurons where communication occurs?

• Synapse

• Myelin sheath

• Dendrite

• Axon

What is the term for chemicals that mimic the action of neurotransmitters?

• antagonists

• synapses

• neurotransmitters

• agonists

What is the all-or-nothing principle in relation to action potentials?

• Action potentials occur randomly

• Action potentials are always weak in strength

• Neurons can partially fire action potentials

• Neurons either fire action potentials at full strength or not at all, there is no in-between.

Name a neurotransmitter that is commonly associated with muscle movement.

• Acetylcholine

• Serotonin

• Glutamate

• Dopamine

Differentiate between excitatory and inhibitory neurotransmitters.

• Excitatory neurotransmitters only work in the brain.

• Excitatory neurotransmitters increase action potential likelihood, while inhibitory neurotransmitters decrease it.

• Inhibitory neurotransmitters have no effect on action potential likelihood.

• Excitatory neurotransmitters decrease action potential likelihood.

How do agonists affect synaptic transmission?

• Agonists inhibit synaptic transmission by blocking receptors on the postsynaptic neuron.

• Agonists cause synaptic transmission to occur in the presynaptic neuron.

• Agonists have no effect on synaptic transmission.

• Agonists enhance synaptic transmission by activating receptors on the postsynaptic neuron.