nervous systems
What is the definition of the nervous system?
The body’s electrochemical communication network consisting of all nerve cells of the peripheral & central nervous systems
what are nerves?
Bundled axons that from neutral cables connect the CNS with muscles, glands, and sensory organs
what are Neurotransmitters?
Chemical messengers that cross the synaptic gap between neurons
what is the cell body?
The cell body (otherwise known as the Soma) is the genetic material that allows neurons to function, also contains the nucleus
endorphins
if the student acted out being hurt but pain oozes out or a body response that activates endorphins
definition of the central nervous system (CNS)
the primary processing center of the body, consisting of the brain and the spinal cord
what are sensory neurons and what do they do?
Neurons that carry incoming information from the brain & spinal cord to the muscles and glands
what is action potential?
Neural impulse, a brief electrical charge that travels down an axon
what is an axon?
a segmented neuron extension that passes messages through its branches to other neurons and muscle glands
sympathetic nervous system
if student acted out a fight or flight response, or a response that increases heart rate and activate energy within the body
definition of the peripheral nervous system
Sensory and motor neurons that connect the CNS to the rest of the body
what are Motor neurons and what do they do?
Neurons that carry outgoing information from the brain & spinal cord to the muscles and glands
what is the refectory period?
Neural processing, brief resting pause that happens after a neuron has fired; subsequent action potential cannot occur until the axon returns to resting state
what is the myelin sheath?
Fatty tissue layer protecting the axon, enables greater transmission speed as neural impulses hop from one node to another
parasympathetic nervous system
if a student acted a digest-and-rest response, or when the body is calm after excitement within the body
what is the somatic nervous system?
Division of the PNS that controls the skeletal muscles, otherwise known as the skeletal nervous system
what are interneurons and what do they do?
Neurons within the brain and spinal cord; communicate internally and process information between the sensory inputs & motor outputs
what is an all-or-nothing response?
A neurons reaction of either firing (with a full strength response) or not firing
what do dendrites do?
Receive chemical information from adjacent neurons through receptor sights, also conducts impulses towards the cell body
somatic nervous system (or conscious body movements/thinking)
if student acted out a conscious body movement or decision and processing
what is the autonomic nervous system?
Part of the PNS that controls the glands & muscles of the internal organs; includes Sympathetic nervous system and parasympathetic
what are the two functions of the ANS (autonomic nervous system) and what do they do?
sympathetic nervous system; arouses body and mobilizes energy & parasympathetic nervous system; calms the body and conserves energy
what is the Endocrine system
Body’s slow chemical communication system; a set of glands and fat tissue that secrete hormones into the bloodstream
whats are Endorphins?
Natural opioid-like neurotransmitters linked to pain control and to pleasure
if student acted out a response to something urgently - or quickly (like touching a hot coffe mug)