Muscle

Which type of muscle is voluntary?

• Cardiac

• Smooth

• Striated

Which of the following is/are NOT associated with skeletal muscle cells?

• Gap junctions

• Glycogen

• Lots of mitochondria

• Multiple nuclei

What are the smallest structural units in skeletal muscle?

• Fascicles

• Myofibres

• Myofibrils

• T-tubules

What is the functional unit of skeletal muscle?

• Sarcolemma

• Sarcomere

• Sarcoplasm

• Sarcoplasmic reticulum

Which protein is NOT present in the thin myofilament?

• Actin

• Myosin

• Tropomyosin

• Troponin

Which of the following is NOT a feature of the myosin molecule?

• ATP binding site

• Calcium binding site

• Hinged head

• Hinged tail

What does the sarcoplasmic reticulum contain?

• ATP

• Calcium ions

• Glycogen

• Myoglobin

In relaxed skeletal muscle the myosin binding sites on actin are blocked by:

• ATP

• Calcium ions

• Tropomyosin

• Troponin

What is the transmitter at the neuromuscular junction?

• Acetylcholine

• Adrenaline

• Glutamine

• Noradrenaline

Muscle contraction is initiated when calcium ions bind to:

• Actin

• Myosin

• Tropomyosin

• Troponin