Intro to the Nervous System
What is the main messenger molecule of the nervous system?
Neurotransmitters
What is the name of the functional junction of neurons?
Synapse
What are the two organs of the CNS?
Brain and spinal cord
True or False: Reflexes don't respond to stimuli
Multiple Sclerosis is caused by the degradation of what?
Myelin Sheaths
Do neurons touch?
No
Multipolar neurons have multiple what?
Dendritic Branches (dendrites also acceptable)
Which region of the brain is in charge of higher order thinking?
Cerebrum
What are the three components of a reflex arc?
Receptor, CNS, Effector
True or False: Addiction is a disease that causes physical changes in brain structure
True
What are the two main divisions of the PNS?
Afferent and Efferent
What is the name of the charge required to achieve before an action potential is propagated?
Threshold potential
Which brain region is in charge of balance?
Cerebellum
What are the symptoms of a stroke?
FAS(T)
Face, Arms, Speech
What component of the nervous system offers support and protection to neurons?
Neuroglia
What channels open during depolarization?
Sodium
What are the three layers of the meninges?
Pia mater, Dura mater, Arachnoid
What is the term for a difference in brain structure?
Neurodivergence
If someone is paralyzed, there is a miscommunication or disfunction between the afferent and ___________ nerves?
efferent
What channels open during repolarization?
Potassium
Which area of the brain controls the motor movements associated with speech?
Broca's area
The stage of cognitive development that corresponds with increased synaptic development (usually in adolescence) is...
Formal Operational
For animals that have experienced prolonged periods of stress, where do scientists see reduced brain activity?
Areas of the brain that handle higher order tasks