PSY 331 - 1/31 - Neuroscience

Neurons are best described as

• positively charged sodium and potassium ions

• chemical molecules that cross the synaptic gap

• nerve cells that function as the building blocks of the nervous sytem

• molecules that travel through the bloodstream

What is the function of dendrites in a neuron?

• Release neurotransmitters into the synapse

• Manage cellular functions

• Transmit signals to the next neuron

• Receive signals from other neurons

The ________ sends an electrical signal to the next neuron when an action potential is triggered

• Axon

• Dendrites

• Cell body

• Myelin sheath

Which of the following will guarantee the beginning of an action potential?

• neurotransmitters bind to receptors on a dendrite

• An electrical impulse from the dendrites reaches the cell body

• The base of the axon reaches a certain, threshold voltage

• Neurotransmitters are released from the end of the axon

What happens when the action potential reaches the axon terminals?

• It stops the neural signal from traveling further

• It causes the neuron to become more negative

• It triggers the release of hormones into the bloodstream

• It triggers the release of neurotransmitters into the synapse