neural communication: unit 3, lesson 1

What is the electrical signal that typically moves from the cell body down the axon to the axon terminals? action potential threshold of excitation hyperpolarization depolarization

action potential

A(n) ________ facilitates or mimics the activity of a given neurotransmitter system. SSRI Axon agonist antagonist

agonist

If the signal exceeds threshold, it is pushed out of the cell body and down the _____ toward the______ between this neuron and the next one. dendrite, myelin, axon ,terminal button synapse ,terminal button ,neurotransmitter, myelin

axon; synapse

If the signal exceeds threshold, it is pushed out of the cell body and down the _______ toward the _____ between this neuron and the next one. dendrite axon terminal button myelin synapse terminal button neurotransmitter myelin

axon; synapse

When a neuron receives a signal, it travels down the dendrite to the ____ where it is processed. neurotransmitter synapse dendrite cell body

cell body

The ________ receive(s) incoming signals from other neurons. myelin sheath terminal buttons soma dendrites

dendrites

________, which play a supportive role in the nervous system, vastly outnumber ________. Neurons; glial cells Axons; neurotransmitters. Neurotransmitters; axons. Glial cells; neurons

glial cells; neurons

An action potential involves Sodium moving ________ the cell and Potassium moving ________ the cell inside;inside inside; outside outside;outside outside; inside

inside; outside

Multiple sclerosis involves a breakdown of the ________. dendrites synaptic vesicles soma myelin sheath

myelin sheath

During resting potential, before the electric charge is sent, the inside of a neuron has a ________ charge. neutral positive or negative positive negative

negative

When resting, the inside of a cell has a ________ charge. During action potential, the cell briefly has a ________ charge. positive; neutral negative; positive neutral; negative positive; negative

negative; positive

Drugs designed to restore neurotransmitter balance in the brain are known as neuro-responsive medications agonists psychotropic medications antagonist

psychotropic medications

Agonists and antagonists mimic or impede neurotransmitters by binding to ________. axons the cell membrane nothing receptors

receptors

The space between a sending and receiving neuron is called a synapses axon neurotransmitter synapse

synapse

The signal travels to the end of the axon, called the ______ , where the signal travels across the synapse to the next neuron. neurotransmitter dendrite terminal button myelin

terminal button