Mod 9 - Functional Organization of Nervous Tissue

Define Sensory

Sense changes through sensory receptors

Define Motor

Respond to stimuli and transmits action potential from CNS

Define Integrative

Analyze incoming sensory information, store aspects and make decisions

CNS

brain and spinal cord

PNS

Sensory receptors and nerves

Sensory receptors

specialized cells that detect things such as temperature and pain

Nerves

bundle of axons and sheaths that connect in the PNS

Cranial nerves and how many

originate from brain

12 pairs

Spinal nerves

Originate from spinal cord

31 pairs

Ganglion

collection of neuron cell bodies outside CNS

(Connect one neuron to another)

Plexus

network of axons and neuron cell bodies located outside of CNS

(network to exchange neural info)

Another word for sensory

afferent

another word for motor

efferent

general senses and special senses

General senses is receptors throughout the body i.e. skin

Special senses is receptors in specific organs i.e. vision

Somatic nervous system

CNS to skeletal muscles

Voluntary

single neuron system

Uses synapse

autonomic nervous system

From CNS to smooth muscles, cardiac muscles and certain glands

Involuntary

Two neuron system (uses ganglia)

two types of autonomic nervous system

sympathetic and parasympathetic

Sympathetic

Physical activity (fight or flight)

parasympathetic nervous system

Regulates resting functions (rest and digest)

enteric nervous system

plexuses within the wall of the digestive tract Do not use CNS

Sensory and motor in ENS

Sensory: stretching of walls

Motor: contracts smooth muscle and secretion of endocrine cells