Nervous System Naomi Patino
Period 3

Major functions of the nervous system

Action Potential and Nerve impulses

Reflex Arc

Tissues of the nervous system

Connective tissue covering

Neurotransmitter

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Classification of neurons

Sensory input
Integration & processing
Motor output

Neurons-> cells that communicate, via electrical impulses, with
other neurons or other tissues.
Neuroglia-->cells that support, nourish, protect, and insulate
neurons.
Neurotransmitters--> the chemical messengers in a synapse, that
convey an electrical impulse from a neuron to another cell.

+Central Nervous system--> Made up of the brain and spinal cord.
Responsible for integration of information and decision-making.
(CNS)
+Peripheral nervous system-->Made up of cranial and spinal nerves that connect the CNS to the rest of the body
Contains sensory (afferent) and motor (efferent) divisions
Somatic nervous system
Autonomic nervous system.
(PNS)

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Multipolar neurons: have many dendrites and one axon arising from
their cell bodies; most neurons with cell bodies in CNS

Bipolar neurons have 2 processes extending from the cell body, a dendrite and an axon;

Unipolar neurons have only 1 process extending from the cell body; outside the cell body, it soon splits into 2 parts that function as 1 axon;

Motor Function

Sensory Function

Integrative function

Carinal and spinal nerves

31 Pairs of spinal cords/ 8 cervical/ 12 thoratic/ 5 sacral and 1 coccygeal

Carnial are connected to the brain and brain stem

The carinal nervese send in sensory information to all 5 sense

The spinal nerves can help communicate with the brain and to help command it on what to do

Threshold stimulus

it is strong stimulus that can cause a lot of NA+ nerouns to enter the body.

NA+ channels

Ions that flown through the cells of the nerous and making them into negative cells because of the gradient of the concentration.

Action pontential

can be created by the synapse, the synapse can be turn into a communicator.

Presynaptic Neruon- messenger E

Postynaptic neuron- Recieving messages.

Neroun/ Axons/ Dendrites/ Nerves/ Neruoglia

Cells that help support the neurons and also protect nerves

Empendymal cells/ Microglia/ oligodenroctyes

Effector

intemeuron

receptors

Sensory Neuron

motor neuron