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Assignment 1

physiology

QuestionAnswer
What are the general functions of the Muscular system 1. Movement 2. Heat production 3. Posture
What is the neuromuscular junction NMJ? A synaptic connection between the terminal end of a motor nerve and a muscle
True or False: During contraction, myosin cross bridges pull the thin filaments away from the center of each of two sarcomeres, thus shortening the myofibril and the entire muscle fiber. False: During contraction, myosin cross bridges pull the thin filaments TOWARD the center of each of two sarcomeres, thus shortening the myofibril and the entire muscle fiber.
The three phases of the twitch contraction are: the latent period, the contraction phase, and the relaxation phase
Smooth, sustained contractions are called tetanic contractions or called: Tetnus
Tonic contraction, or muscle tone, is the low level of continuous contraction characteristic of the muscles of normal individuals when they are awake. This is important because Muscle tone plays an important role in posture.
What body parts is cardiac muscle found in? only the heart
Which two types of muscles are involuntary? Cardiac and Smooth
Which muscle cells contains zero gap-junctions? Skeletal
True or false: Skeletal muscles contain many nucleuses True
What gives the striations in cardiac muscle? The regular organization of myofibrils into sarcomeres in the muscle tissue
Created by: Diana.smith
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