Mammalian Physiology Lab Final Study Guide

Mammalian Physiology Lab Final Study Guide - Drugs...

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Drugs Lidocaine d-tubocurare epinephrine acetylcholine physostigmine atropine sodium azide pilocarpine sodium phosphate saline glucose lasix Lab 2: Neuromuscular Physiology Transducer: F-2000 Lab 2 Part A(1): Multi-Unit Summation Setup: gastrocnemius separated and attached to myograph, sleeve electrode stimulates sciatic nerve Procedure: find threshold stimulus, start recording, and stimulate with increasing voltage until you reach maximum force of contraction. Stimulate no more frequently than every 10 seconds Physiology: A motor unit is the neuron, the neuromuscular junction, and the muscle fibers it innervates. Individual motor units possess different thresholds, so the first ones recruited are those with the lowest threshold. As you increase the strength of the stimulus, you will bring in more and more neurons and motor units. When all of the motor units have been activated, the muscle contracts at its maximum force. After this point, the strength of the stimuli could increase but the force of contraction will not. Lab 2 Part A (2): Generation of Tetany Setup: Same Procedure: Increase the frequency of stimuli until tetany is produced Physiology: Tetany is a state of maximum sustained contraction when all of the motor units are firing as rapidly as possible. Tetany is achieved through wave summation.
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Mammalian Physiology Lab Final Study Guide - Drugs...

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