Smooth vs Skeletal Muscle Quiz

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Carey, Amanda

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Smooth vs Skeletal Muscle Quiz


Froggy Jumps Smooth vs Skeletal Muscle QuizVersión en línea Test your muscle knowledge por Carey, Amanda 1 Where is smooth muscle typically found in the body? a Attachs to bones for movement b Walls of hollow organs and blood vessels c In the heart only 2 Describe the general microscopic structure of smooth muscle. a Long, multinucleated fibers with striations b Spindle-shaped cells with single central nucleus and no striations c Cubic cells in neat rows with multiple nuclei 3 Describe the general microscopic structure of skeletal muscle. a Long, cylindrical, multinucleated fibers with striations b Non-striated fibers with one nucleus c Short, spindle-shaped cells with a single nucleus 4 How do smooth and skeletal muscles differ in control? a Both are involuntary b Both are voluntary c Smooth is involuntary; skeletal is voluntary 5 How are smooth and skeletal muscles similar? a Both do not use myosin and use calcium b Both contract by actin-myosin and use calcium c Both contract by actin-myosin and both do not use calcium 6 List a key step of smooth muscle contraction. a Calcium directly binds myosin heads b Calcium binds calmodulin, activating myosin light chain kinase c Troponin-tropomyosin moves to allow actin 7 List a key step of skeletal muscle contraction. a Calcium binds troponin, exposing myosin-binding sites on actin b Calcium binds calmodulin, activating myosin light chain kinase c Calcium inhibits myosin ATPase 8 Where is smooth muscle most abundant? a In walls of blood vessels, GI tract, and airways b In the brain’s gray matter c In skeletal muscle fibers only 9 What is the primary regulator of skeletal muscle contraction? a Calcium release from the sarcoplasmic reticulum b Calmodulin directly opens actin sites c Calcium from extracellular space only 10 What structures anchor skeletal muscle to bone? a Cartilage b Ligaments c Tendons 11 Which protein blocks actin’s myosin-binding sites in relaxed skeletal muscle? a Tropomyosin (with troponin complex) b Calmodulin c Myosin light chain kinase 12 Which feature is unique to smooth muscle cells? a Lack of striations b Presence of sarcomeres c Multinucleation 13 Smooth muscle contraction is typically slower than skeletal because: a Cross-bridge cycling and regulatory mechanics are different b Smooth does not use ATP c Skeletal is non-contractile 14 Which ion is crucial for smooth muscle contraction via MLCK? a Potassium b Calcium c Sodium 15 Which ion triggers skeletal muscle contraction via troponin? a Sodium b Magnesium c Calcium 16 What is the basic functional unit of skeletal muscle? a Sarcoplasm b Sarcomere c Myofibril 17 Which structure stores calcium for skeletal muscle contraction? a Mitochondria b Sarcoplasmic reticulum c Golgi apparatus 18 What happens to actin sites when calcium is released in skeletal muscle? a Actin degrades b Troponin moves, tropomyosin exposes myosin-binding sites c Myosin binding sites close 19 Which of the following describes smooth muscle regulation? a Only hormones regulate it b Neural and hormonal input modulate tone c Only electrical stimulation regulates it 20 Which feature helps smooth muscle sustain contractions longer? a Constant rapid ATP turnover b Very fast cross-bridge cycling c Latch-bridge mechanism and cross-bridge cycling 21 Which muscle type is typically under conscious control (voluntary)? a Skeletal muscle b Cardiac muscle c Smooth muscle 22 Which muscle type is most resistant to fatigue due to prolonged contractions? a Smooth muscle b Cardiac muscle c Skeletal muscle 23 What stimulates smooth muscle relaxation? a Direct ATP depletion b Neural inhibition or counteracting signals and NO c Continuous parasympathetic tone 24 What is the role of calmodulin in smooth muscle? a Pumps calcium out of cell b Inhibits myosin ATPase c Activates myosin light chain kinase (MLCK) 25 What initiates skeletal muscle contraction in a motor neuron signal? a Norepinephrine release b Acetylcholine release at neuromuscular junction c Dopamine release 26 Which structure stores energy for contraction in skeletal muscle? a ATP and creatine phosphate in cytoplasm b Lipid droplets exclusively c Glycogen only

Smooth vs Skeletal Muscle Quiz

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Smooth vs Skeletal Muscle QuizVersión en línea

por Carey, Amanda

Where is smooth muscle typically found in the body?

Describe the general microscopic structure of smooth muscle.

Describe the general microscopic structure of skeletal muscle.

How do smooth and skeletal muscles differ in control?

How are smooth and skeletal muscles similar?

List a key step of smooth muscle contraction.

List a key step of skeletal muscle contraction.

Where is smooth muscle most abundant?

What is the primary regulator of skeletal muscle contraction?

What structures anchor skeletal muscle to bone?

Which protein blocks actin’s myosin-binding sites in relaxed skeletal muscle?

Which feature is unique to smooth muscle cells?

Smooth muscle contraction is typically slower than skeletal because:

Which ion is crucial for smooth muscle contraction via MLCK?

Which ion triggers skeletal muscle contraction via troponin?

What is the basic functional unit of skeletal muscle?

Which structure stores calcium for skeletal muscle contraction?

What happens to actin sites when calcium is released in skeletal muscle?

Which of the following describes smooth muscle regulation?

Which feature helps smooth muscle sustain contractions longer?

Which muscle type is typically under conscious control (voluntary)?

Which muscle type is most resistant to fatigue due to prolonged contractions?

What stimulates smooth muscle relaxation?

What is the role of calmodulin in smooth muscle?

What initiates skeletal muscle contraction in a motor neuron signal?

Which structure stores energy for contraction in skeletal muscle?