WorksheetsSliding Filament Theory
Total questions: 18
Worksheet time: 10mins
Muscles are attached to bones by _____.
Ligaments
Tendons
Cartilage
Axons
Contractile unit of a muscle.
sarcomere
motor unit
fascicle
myofibril
Thick filaments are in a myofibril are
ATPase
Sarcoplasmic reticulum
Actin
Myosin
Thin filaments in a myofibril are
Sarcomeres
Sarcoplasm
Actin
Myosin
Calcium:
causes ATP binding to actin
increases the action potential along the sarcolemma
binds to proteins on myosin
triggers the binding of myosin to actin
What is a crossbridge?
Where myosin binds to actin
Where the calcium crosses into the cytoplasm
Where calcium binds with troponin
None of the answers are correct.
The energy needed to perform a muscle contraction comes directly from
ATP
Oxygen
Glucose
Calcium
Calcium binds to ___of the troponin-tropomyosin complex.
troponin
tropomyosin
actin
myosin
The neurotransmitter stored in the axon terminal identified as #3
Calcium Ion (Ca2+)
Protein Channel
Acetylcholine
Synaptic Cleft
What is the structure that stores the Calcium in the muscle cell.
Sarcoplasm
Sarcolemma
Myoglobin
Sarcoplasmic Reticulum
Which is voluntary?
cardiac
skeletal
smooth
Place the following events in sequence:
A) Your arm moves
B) An impulse travels along a nerve
C) You decide you want to move your arm.
A B C
C B A
C A B
A C B
Which filament slides inward during muscle contraction
Actin
Myosin
What layer of connective tissue covers the muscle fiber?
endomysium
epimysium
perimysium
What layer of tissue surrounds the entire muscle?
Endomysium
Epimysium
Perimysium
Which of the following best describes the power stoke?
actin's troponin pulls on the myosin filament
myosin heads pull on binding sites of the actin filament
Which one shows the correct order of muscle organization?
muscle, muscle fiber, myofibril, fascicle
fascicle, muscle fiber, muscle, myofibril
muscle, fascicle, muscle fiber, myofibril
myofibril, muscle, muscle fiber, fascicle
Which level of muscle organization would represent the cell?
muscle
fascicle
muscle fiber
myofibril
