Muscular physiology 0.0 / 5 ? BiologyVeterinary medicineUniversityAll boards Created by: ezCreated on: 04-11-13 22:21 What is the most basic contractile unit of a muscle? Sarcomere 1 of 24 What is a group of muscle fibres called? Fasciculus 2 of 24 What membrane surrounds a muscle? Epimysium 3 of 24 What membrane surrounds each individual fasciculus? Perimysium 4 of 24 What membrane surrounds each individual muscle fibre? Endomysium 5 of 24 What connects muscle to bone? Tendon 6 of 24 What are the dark striations that appear on histological slides? Z-discs 7 of 24 What is the A-band? The dark zone seen on histological specimens 8 of 24 What is the I-band? Area of thin actin filaments 9 of 24 Which muscle cells are multinucleate? Striated muscle only 10 of 24 Where does the action potential run in a myofibril? Into the T-Tubules 11 of 24 What is the function of calsequestrin? Prevents Calcium ions from leaving the sarcoplasmic reticulum 12 of 24 What is the smallest unit of an actin filament? G-Actin 13 of 24 Which Troponin binds to the tropomyosin? Troponin T 14 of 24 What does Troponin I bind to? The actin filament 15 of 24 Which muscle type has the least developed sarcoplasmic reticulum? Smooth muscle 16 of 24 Which muscle type relies on Calcium-induced-Calcium release? Cardiac muscle 17 of 24 What is the function of myosin light chain kinase? Phosphorylation of myosin light filament 18 of 24 What is the function of calmodulin? To bind to Ca2+ ions in smooth muscle, activating Myosin Kinase 19 of 24 What effect does the sympathetic nervous system have on cardiac muscle? Increases contractility 20 of 24 What is the effect of speeding up the rate of conduction in heart tissue? Dromotropism 21 of 24 What is the effect of changing the heart rate by altering cardiac nerve activity or SA node rhythms? Chronotropism 22 of 24 What is the effect of altering the force of muscular contractions? Inotropism 23 of 24 What is isotropism dependent on? Calcium ion levels 24 of 24
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