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WorksheetsMuscles
Total questions: 31
Worksheet time: 16mins
Which molecules bind to the actin molecule in a way that prevents a myosin head from forming a cross bridge?
Myosin
Actin
Troponin-Tropomyosin
Which molecule supplies energy for the flexing of the myosin head "power stroke".
calcium
ATP
sodium
Which molecule has a movable head that grabs and provides a power stroke when activated?
Myosin
Actin
Troponin-Tropomyosin
Which molecule forms the majority of the thin filament?
Myosin
Actin
Troponin-Tropomyosin
What molecule binds to the blocking molecules, causing them to move and expose the myosin binding site?
calcium
sodium
ATP
Another name for a muscle cell
myofibril
sarcomere
muscle fiber
The contractile element of the fiber. It is contained between two Z-lines (disks).
sarcomere
muscle fiber
cardiac muscle
What is released from the sarcoplasmic reticulum?
Inorganic phosphate
ADP
Calcium
ATP
What is the name of the neurotransmitter released at a neuromuscular junction?
Calcium
Acetylcholine
Dopamine
Troponin
Please select the correct order
1. Muscle cell releases calcium
2. Neurotransmitter releases acetylcholine
3. Sodium & Potassium pump opens
4. Acteylcholine signals cell membrane gates to open
1. Neurotransmitter releases acetylcholine
2. Acteylcholine signals cell membrane gates to open
3. Sodium & Potassium pump opens
4. Muscle cell releases calcium
1. Sodium & Potassium pump opens
2. Acteylcholine signals cell membrane gates to open
3. Muscle cell releases calcium
4. Neurotransmitter releases acetylcholine
1. Neurotransmitter releases acetylcholine
2. Acteylcholine signals cell membrane gates to open
3. Muscle cell releases calcium
4.Sodium & Potassium pump opens
The fastest way to make ATP available for muscles
Creatine Phosphate
Fermentation
Cellular Respiration
Sliding Filament Theory
___slides inward during muscle contraction.
actin
myosin
Motor neurons electrically stimulate nearby muscle fibers at ______.
Creatine phosphate
Actin filament
Neuromuscular junction
Cross-bridges
The two protein molecules, closely associated with actin filaments are ______ and ______.
Actin and Myosin
Actin and Tropomyosin
Troponin and Tropomyosin
Tubulin and Tropomyosin
What is the ion necessary for muscle contraction?
Cl
Ca
Na
K
Name the following in order from largest to smallest:
muscle, muscle fascicle, muscle cell, myofibril, filaments
muscle, muscle fascicle, muscle cell, filaments, myofibril
muscle, muscle cell, muscle fascicle, myofibril, filaments
muscle, muscle cell, muscle fascicle, filaments, myofibril
What is the name of the connective tissue covering a fascicle?
epimysium
endomysium
perimysium
What happens in the transverse tubules of a muscle cell?
excess ATP is stored in the tubules
calcium ions are released into tubules' extracellular fluid
action potentials are conducted through the tubules to the inside of the cell
ATP is produced in the mitochondria found in the tubules
