Central nervous system (CNS)

Peripheral nervous system (PNS)

Brain

Spinal cord

Cranial nerves III-XII

Spinal nerves

Autonomic (sensory division)

Somatic (motor division)

Sensory division

sensing stuff outside the body

Sensory system

Motor system

sympathetic

= figher flight, increases breathing & muscle tone in heart

parasympathetic

= rest, brings it down 2 a norm resting state & also controls digestion

Properioception ~knowing where ur body parts are

Somatic division of PNS

Motor system

Voluntary control

Skeletal muscle movement

Perception of external stimuli

(Conscious of this)

(EX: Seeing something out of the corner of eye & turning head)

Touch

& Has its own motor system

look @ these

PS

Kensey

dont worry about this 

I put this in soo I wouldnt forget 2 review it 4 anatomy

Neurons

2 types 

Afferent (sensory)

Efferent (motor)

motor neurons

Conduct CNS - effectors

Sensory neurons

Conduct impulses receptors - CNS

Reflex arc

&

important b/c

Specialized neural pathways

Synapse, takes place in spinal cord

Signal sent simultaneously to brain & ,spinal cord~ while its being sent back from motor neurons

If you burn your hand, signal is sent fast enough that you can pull your hand away (unconsciously- w/o thinking abt it)

Nerves/Neuron

parts

Cell body

houses cellular organelles

Axon

sends impulse away from neuron

Short projections (branches- related 2 what its innvervating)

includes:

Schwann cells (form mylin sheath)

Nodes of Ranvier (space where there is no sheath)

[Functs 2 increase the signal 2 where it needs 2 go, makes it faster, increases conductance by making ions crazy]

Dendrites

Receives/transmits signal

long projections

The stretching and branching (long projections) of the dendrites

PURPOSE IS 2

Muscle Structure

& layers

Know that there are 3 layers

There r 3 layers of CT in skeletal muscle:

Epimysium (Outer)

Perimysium (Middle)

Endomysium (Inner)

& the muscle cell/fiber

-fascicle- bundle of muscle fibers/cells

-muscle fibers- indiv unit

-myofibrils- bundles of myofilaments

-myofilaments (contractile proteins)

            -actin

            -myosin

Muscle fibers

parts

Largely composed of Proteins

Actin (thin) filaments

Myosin (thick) filaments

Sarcomere

length from Z line to Z line

Muscle fiber

REVIEW IT

Kensy-- dont worry about this I put this in 4 anatomy

Muscle contraction

sliding filament theory

Muscle contraction 

In detail

(will add if I hve time)

Skeletal system

Functions

Support

point of Attachment 4 muscles

Movement

Protection 

Blood cell production

(bone marrow produces immature blood cells)

Storage of calcium