Week 10 Quiz 7 Attempt 1

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American Public University *

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Biology

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Dec 6, 2023

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Attempt Score 100 / 100 - 100 % Overall Grade (Highest Attempt) 100 / 100 - 100 % Question 1 4 / 4 points Upon skeletal muscle membrane depolarization, what structures are triggered to open? Question options: Motor end plates Synaptic clefts Voltage-gated sodium channels Neurotransmitters Axon hillocks Hide question 1 feedback Good work; your answer is correct! Question 2 4 / 4 points In muscular hypertrophy, what happens to muscle fibers? Question options: Structural proteins are added and cell diameter increases Muscle mass decreases Structural proteins are lost and cell diameter decreases New muscle cells are formed Muscle fibers deteriorate from lack of use Hide question 2 feedback Good work; your answer is correct! Question 3 4 / 4 points

Which property allows muscle tissue to pull on its attachment points and shorten with force? Question options: Elasticity Extensibility Excitability Contractility Volatility Hide question 3 feedback Good work; your answer is correct! Question 4 4 / 4 points Which two proteins interact to cause a contraction in skeletal muscle? Question options: Collagen and Actin Adenine and Guanine Keratin and Collagen Actin and Myosin Myosin and Elastin Hide question 4 feedback Good work; your answer is correct! Question 5 4 / 4 points How is Treppe different from Tetanus? Question options:

Treppe occurs with relaxation in between stimuli Treppe and tetanus are essentially the same Treppe results in a fused contraction Treppe does not result in greater contractile force Treppe occurs when successive stimuli occur before the muscle can relax Hide question 5 feedback Good work; your answer is correct! Question 6 4 / 4 points In the Sliding Filament Model of Contraction, actin and myosin filaments slide past one another using what as an energy source? Question options: ATP Carbon Dioxide NADH DNA ADP Hide question 6 feedback Good work; your answer is correct! Question 7 4 / 4 points Which type of contraction allows a muscle to produce tension without changing the angle of a skeletal joint or moving a load? Question options: A functional group of sarcomeres All of the muscle fibers in a specific muscle

A packet of actin and myosin microfilaments A motor neuron and the muscle fibers it innervates The sarcomere and its associated sarcolemma Hide question 7 feedback Good work; your answer is correct! Question 8 4 / 4 points Which of the following is not a type of muscle tissue? Question options: Skeletal Muscle Elastic Muscle Cardiac Muscle Smooth Muscle All of the above are types of muscle tissue Hide question 8 feedback Good work; your answer is correct! Question 9 4 / 4 points Slow oxidative (SO) muscle fibers: Question options: Use primarily anaerobic glycolysis May fatigue more quickly than fast glycolic and fast oxidative fibers Do not produce ATP Are intermediate types between fast glycolic and fast oxidative fibers Use primarily aerobic respiration Hide question 9 feedback

Good work; your answer is correct! Question 10 4 / 4 points A muscle-forming stem cell is called a what? Question options: Myoblast Satellite cell Mesodermal cell Somite Myotube Hide question 10 feedback Good work; your answer is correct! Question 11 4 / 4 points Where does a muscle fiber first respond to signaling from a motor neuron? Question options: Myosin binding site Flexible hinge region Excitation point Neuromuscular Junction ATP-binding site Hide question 11 feedback Good work; your answer is correct! Question 12 4 / 4 points Smooth muscle tissue can be found in all but which of the following places? Question options:

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