Font size
WorksheetsIB Muscle and muscle contraction
Total questions: 10
Worksheet time: 7mins
Identify the structure in the image
(a)
Identify the role of ATP in muscle contraction
Break cross bridge between myosin and actin
Expose binding sites on actin
Stimulate the release of calcium ions
Formation of cross bridges
Identify the structure from which calcium ions are released in a muscle fibre
(a)
Identify the state of the muscle in the image
Relaxed
Contracted
Identify the role of calcium ions in muscle contraction
Binds to tropomyosin and uncovers troponin
Exposes binding sites on myosin heads
Binds to troponin and moves tropomyosin to expose binding sites on actin
Causes power stroke
State the general term for the actin and myosin protein filaments found in muscle fibres
(a)
Which type of muscle is myogenic?
Skeletal
Smooth
Cardiac
Fast twitch
What happens during muscle contraction?
The width of the dark bands is reduced.
The distance between Z lines decreases
The number of light bands is reduced.
Actin and myosin filaments coil up
Identify the substance released from the pre synaptic neuron that forms a junction with muscle tissue
Myelin
Acetylcholine
Calcium ions
Pyruvate
A skeletal muscle contains bundles of elongated muscle fibre cells. What is the longest structure within each fibre?
Sarcomere
A myosin filament
An actin filament
Z line
