Neuromuscular system Flashcards
What does the CNS consist of?
Brain & spinal cord
What is the peripheral nervous system?
Network of spinal nerves to and from the spinal cord in the body
Afferent neurons
Sensory neurons that carry signal from stimuli to the CNS
Efferent neurons
Motor neurons that carry signal from CNS to muscles
Somatic nerves
Voluntary movement
Autonomic/ visceral nerves
Involuntary movement
Neurons
Cell that conducts electrical nerve impulse
Name the order of neuron cell parts that an electrical impulse flows
Dendrites, cell body, axon, axon terminals
Synapse
Gap between that neuro signal passes to other neurons, muscles, or glands
Nerves
Bundles of nerve fibers
Which nerve bundle has both afferent and efferent fibers?
Spinal
Myofibril
Contractile muscle filaments made of a strand of sacromeres
Actin
Thiner contractile muscle filament; moves past myosin during contraction
Myosin
Thicker stationary muscle filament
Sacromere
Contracting unit of a muscle; a section of myofibril
Muscle fascicle
a bundle of muscle fibers
Contraction
When the sacromere shortens of a muscle shortens; uses ATP; actin and myosin filaments slide past each other, but stay the same length
What is amyotrophic lateral sclerosis (ALS) aka Lou Gehrig’s disease
Motor neurons degenerate leading to loss of voluntary movement
What is muscular dystrophy?
Abnormal genes prevent the protein that makes muscles causing muscles to weaken. Both voluntary and involuntary muscles are compromised.
