Muscle Mastery: Chapter 9-1 Quiz

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Test your skeletal muscle physiology knowledge.

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Froggy Jumps Muscle Mastery: Chapter 9-1 QuizVersión en línea Test your skeletal muscle physiology knowledge. por bre 1 What triggers Ca2+ release during excitation-contraction coupling? a Voltage-gated receptors on the sarcoplasmic reticulum b ATP binding to troponin releases calcium c Acetylcholine directly activates calcium stores 2 Which part shortens during muscle contraction? a Z-line and M-line b A band only c I band and H zone 3 What pulls the thin filament toward the center of the sarcomere? a ATP synthesis b Sarcomere disassembly c Cross-bridge cycling (power stroke) 4 Which energy system is used for a short, intense burst (~5-10s)? a Beta-oxidation b Creatine phosphate system c Aerobic respiration 5 What molecule blocks myosin binding sites on actin at rest? a Calmodulin b Troponin c Tropomyosin 6 Which fibers fatigue quickly but generate rapid force? a Fast-glycolytic (Type IIx) b Slow-oxidative (Type I) c Fast-oxidative (Type IIa) 7 What two ions are essential for muscle excitation and contraction? a Mg2+ and Fe2+ b K+ and Cl- c Ca2+ and Na+ 8 What causes relaxation after contraction? a Return of Ca2+ to SR and detachment of cross-bridges b ATP depletion c Continued calcium release 9 What is the functional unit of a muscle fiber? a T-tubule b Sarcomere c Myofibril 10 What anchors skeletal muscle fibers within a fascicle? a Endomysium b Perimysium c Epimysium

Froggy Jumps

Muscle Mastery: Chapter 9-1 QuizVersión en línea

Test your skeletal muscle physiology knowledge.

por bre

What triggers Ca2+ release during excitation-contraction coupling?

Voltage-gated receptors on the sarcoplasmic reticulum

ATP binding to troponin releases calcium

Acetylcholine directly activates calcium stores

Which part shortens during muscle contraction?

Z-line and M-line

A band only

I band and H zone

What pulls the thin filament toward the center of the sarcomere?

ATP synthesis

Sarcomere disassembly

Cross-bridge cycling (power stroke)

Which energy system is used for a short, intense burst (~5-10s)?

Beta-oxidation

Creatine phosphate system

Aerobic respiration

What molecule blocks myosin binding sites on actin at rest?

Calmodulin

Troponin

Tropomyosin

Which fibers fatigue quickly but generate rapid force?

Fast-glycolytic (Type IIx)

Slow-oxidative (Type I)

Fast-oxidative (Type IIa)

What two ions are essential for muscle excitation and contraction?

Mg2+ and Fe2+

K+ and Cl-

Ca2+ and Na+

What causes relaxation after contraction?

Return of Ca2+ to SR and detachment of cross-bridges

ATP depletion

Continued calcium release

What is the functional unit of a muscle fiber?

T-tubule

Sarcomere

Myofibril

What anchors skeletal muscle fibers within a fascicle?

Endomysium

Perimysium

Epimysium

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Muscle Mastery: Chapter 9-1 Quiz

Froggy Jumps

Sobre esta actividad

Creada por

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Muscle Mastery: Chapter 9-1 QuizVersión en línea

por bre

What triggers Ca2+ release during excitation-contraction coupling?

Which part shortens during muscle contraction?

What pulls the thin filament toward the center of the sarcomere?

Which energy system is used for a short, intense burst (~5-10s)?

What molecule blocks myosin binding sites on actin at rest?

Which fibers fatigue quickly but generate rapid force?

What two ions are essential for muscle excitation and contraction?

What causes relaxation after contraction?

What is the functional unit of a muscle fiber?

What anchors skeletal muscle fibers within a fascicle?

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