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WorksheetsSkeletal and Muscular System Quiz
Total questions: 12
Worksheet time: 6mins
The point at which two bones meet is called a:
Ligament
Tendon
Joint
Cartilage
Which bone is part of the axial skeleton?
Humerus
Femur
Skull
Radius
What type of joint is the elbow joint, allowing for flexion and extension?
Ball-and-socket joint
Pivot joint
Hinge joint
Gliding joint
Which bone is NOT part of the appendicular skeleton?
Pelvis
Sternum
Femur
Scapula
What is the functional unit of a skeletal muscle that contracts when stimulated by a motor neuron?
Sarcomere
Myofibril
Myosin filament
Actin filament
Which protein, found in muscles, is responsible for binding with calcium ions and initiating muscle contraction?
Actin
Myosin
Troponin
Tropomyosin
What is the main function of the muscular system's antagonist muscles?
Initiate muscle contractions
Provide support and stability
Oppose or reverse a particular movement
Store energy in the form of ATP
What is the term for the junction between a motor neuron and a muscle fiber, where the transmission of nerve impulses triggers muscle contraction?
Neuromuscular junction
Synaptic cleft
Myofibril junction
Motor unit
In the context of muscle contraction, what is the role of ATP (adenosine triphosphate)?
Initiating muscle relaxation
Facilitating the sliding of myofilaments
Storing oxygen in muscle cells
Regulating muscle temperature
Which of the following describes the correct sequence of events in the sliding filament mechanism?
Myosin heads bind to actin → ATP is hydrolyzed → Cross-bridge detachment occurs
Calcium binds to troponin → Tropomyosin shifts → Myosin binds to actin → Power stroke
ATP binds to actin → Myosin binds to ATP → Calcium is released from the sarcoplasmic reticulum
Troponin binds to myosin → Calcium detaches → ATP is used for muscle relaxation
What directly triggers the release of calcium ions from the sarcoplasmic reticulum during muscle contraction?
Binding of ATP to myosin
Action potential traveling along the sarcolemma and down the T-tubules
Hydrolysis of ATP into ADP and Pi
The movement of tropomyosin away from the actin-binding sites
During muscle contraction, what happens to the H-zone and I-band as the sarcomere shortens?
Both the H-zone and I-band disappear
The H-zone disappears, while the I-band shortens
The I-band disappears, while the H-zone shortens
Both the H-zone and I-band remain unchanged
