Neurons
These basic building blocks of the nervous system.
What are neurons?
What is the all-or-none principle?
This major subsystem contains the brain and spinal cord.
What is the Central Nervous System?
This neurotransmitter is linked with learning and memory and enables muscle action.
What is acetylcholine?
This hormone, often released during stress, prepares the body for “fight-or-flight.”
What is adrenaline?
These cells make up the myelin sheath along the axons.
What are glial cells?
The process of a neuron's resting state.
What is polarization?
This division of the nervous system connects the Central NS to the rest of the body.
What isthe Peripheral Nervous System?
This neurotransmitter influences movement, learning, attention, and emotion; too much is linked with schizophrenia.
What is dopamine?
This hormone helps regulate hunger by signaling satiety (feeling full).
What is leptin?
In a reflex arc, these neurons carry messages from the body’s tissues and receptors to the spinal cord & brain.
What are sensory neurons?
After a neuron fires, it enters this brief recovery phase where it cannot fire again immediately.
What is the refractory period?
This subdivision of the nervous system controls voluntary movements like walking or dancing.
What is the Somatic Nervous System?
Low levels of this neurotransmitter are linked with depression; many antidepressants work to increase it.
What is serotonin?
This hormone is released by the stomach to stimulate hunger.
What is ghrelin?
In a reflex arc, these neurons connect sensory and motor neurons and process information within the spinal cord.
What are interneurons?
The process of triggering action potential.
What is depolarization?
This subdivision of the Nervous System is also referred to as the fight-or-flight system.
What is the Sympathetic Nervous System?
This excitatory neurotransmitter is linked with memory but too much can overstimulate the brain, causing seizures.
What is glutamate?
Sometimes called the “love hormone,” this chemical is linked to bonding, trust, and social connection.
What is oxytocin?
In a reflex arc, these neurons carry instructions from the brain and spinal cord to the muscles and glands.
What are motor neurons?
The absorbtion or neurotransmitters back into the terminal branches after a message is sent.
What is reuptake?
This subdivision of the Nervous System is also known as the Rest-&-Digest system.
What is the Parasympathetic Nervous System?
This neurotransmitter is a major inhibitory one, helping to regulate sleep and reduce anxiety.
What is GABA?
Produced by the pineal gland, this hormone helps regulate circadian rhythms and the sleep/wake cycle.
What is melatonin?