BIOL 1412 Lecture Notes - Exocytosis, Axon Terminal, Myocyte

• School: University of Manitoba
• Department: Biological Sciences
• Course: BIOL 1412
• Professor: Paul Messing

Document Summary

1) excitable - respond to stimuli and produce aps. 4) elastic - return to original shape after contraction or extension. Each muscle fibre (cell) innervated by only one neuron. Axon and motor neuron branches to innervate several muscle fibres (fig. A single motor neuron + all the muscle fibres it innervates = a motor unit. Presynaptic cell (neuron) w/ ach (nt) vesicles. Post-synaptic cell (muscle) membrane (sarcolemma) - specialized w/ ach ( = motor end plate) 9. 9) ap (ap has same properties/ channels as on a neuron) (fig. Note: 1 ap (neuron) 1 epp 1 ap (always!) ie. always a critical stimulus because: a) lots ach released b) motor endplate has many receptors.