BLG 10A/B Study Guide - Midterm Guide: Resting Potential, Dural Venous Sinuses, Endoplasmic Reticulum
Document Summary
Fascicle: bundle of muscle fibers surround by connective tissue. Neuromuscular junction: the place where a motor neuron stimulates a muscle fiber, consists of; The axon terminal: the end of the motor neuron axon. Terminals have small membranous sacs (synaptic vesicles) that contain the neurotransmitter ach) A specific part of the sarcolemma that contains ach. The space between the axon terminal and the motor end plate. Ach effect quickly terminated by enzyme achsterase in synaptic cleft. Breaks down ach to acetic acid and choline. Prevents continued muscle fiber contraction in the absence of additional stimulation. Each muscle served by at least one motor nerve. Motor nerve obtains axons of up to hundreds of motor neurons. Axons branch into terminals, each of which nmj with single muscle fiber. Motor unit: motor neuron and all (four to several hundred) muscle fibers it supplies. Speed of contraction: slow or fast fibers according to.
