Somatic and Autonomic Nervous System

Prefix: Sacro

Flesh

Prefixes: Myo-, Mys-,

Muscle

Neuromuscular junction

junction between a motor neuron and a muscle fiber

Axon Terminal

terminal button (bouton) in muscle

Subsynaptic Membrane

motor end plate

End-plate potential

graded potential on motor end plate

NT

Acetylcholine (ACh)

Acetylcholinesterase (AchE)

enzyme that breaks down ACh

Is the somatic nervous system voluntary or involuntary

voluntary

the somatic nervous system controls one type of effector

skeletal muscle

the somatic nervous system has one type of efferent neuron:

motor nueron

muscle fiber AKA

muscle cell (myocyte)

motor unit

a motor neuron and all the muscle fiber in innervates

sarcolemma

equivalent of the plasma membrane

sarcoplasm

this is the equivalent of the cytoplasm and stores glycogen and myoglobin (stores O2)

why is mitochondria important

produces ATP

sarcoplasmic reticulum (SR) location? What does it store?

Surrounds myofibrilis, stores Ca

transverse t-tubules location?

in sarcolemma

transverse t-tubules importance

allows action potentials to get into the interior of muscles

how many nuclei do muscle cells have?

many

DHP

voltage sensitive protein located on the T-tuble and responds to depolarization of the T-Tubule

ryanodine

calcium channel located on the SR and connected to the T-tubule via DHP

myofibrils contain ________ which are fundamental skeletal muscles

sarcomeres

sarcomere

composed of both thin and thick filaments that overlap each other

microfilament structure- thin filament: Actin

myosin binding site (MBS)

microfilament structure- thin filament: tropomyosin

can shift to cover and uncover MBS

microfilament structure- thin filament: Troponin

calcium binds to it

tropomyosin and troponin are

regulatory proteins