CH2_neurotransmitters

Chemical substance stored in tiny sacs within terminal buttons and involved in carrying information across the synaptic gap to the next neuron

Each axon breaks out into fibers that end in structures called

Sacs within terminal buttons that contain neurotransmitters

Some neurotransmitter is reabsorbed into the axon that released it, to await the next neural impulse

Neuron sending the message

Neuron receiving the message

Stimulates firing of neurons involved in muscle action, learning & memory. Deficiency = Alzheimers

Keeps too many neurons from firing, so controls precision. Low levels = anxiety

Inhibits firings of CNS neurons. Excites heart muscle, intestines, and urogenital tract. Controls alertness. Too much = manic, too little = depression. Works with ACH to regulate sleep.

Controls voluntary movement. Affects sleep, mood, attention, learning, ability to recognize rewards in environment. Low levels = Parkinsons, deterioration of physical movement.

Regulation of sleep, mood, attention, learning.

Neural opiates that stimulate firing of neurons. Shield the body from pain and elevate pleasure

Hormone/neurotransmitter that regulates love and social bonding. Released right after birth in mother.

Contains a nucleus which directs manufacture of growth & maintenance substances

Parts of a neuron

Provides support, nutritional benefits and other functions to neurons

Tiny spaces between neurons

Once the electrical impulse reaches its threshold, it fires and moves all the way down the axon without losing any of its intensity

Brain wave of positive electrical charge that sweeps the axon

The stable, negative charge of an inactive ion

Electrically charged particles

Layer of fat cells that encase and insulate most axons

The part of a neuron that carries information from the cell body toward other cells

Treelike fibers projecting from a neuron, which receive information and orient it towards the cell body

When the charge outside and inside the membrane is closer, the neuron is

when the ion channels are closed, there's a slight negative charge inside the cell, and a positive charge outside, the neuron is

Negatively and positively charged ions will

When an incoming impulse raises a neuron's voltage, it becomes

When a neuron is activated, its _________ open

Powerful stress hormones

Two ions containing positive charges

Tiny “gates” in the myelin sheath that allow ions to pass into & out of cells