Muscular System Quiz 3 (A)

Connective tissue surrounding individual muscle cells.

• Endomysium

• Perimysium

• Epimysium

• Fascia

Attaches a muscle to a bone.

• Tendon

• Ligament

• Cartilage

• Nerve

The thick myofilaments in a myofibril are.

• Myosin

• Actin

• Tropomyosin

• Troponin

The thin myofilaments in a myofibril are.

• Actin

• Myosin

• Tropomyosin

• Titin

Provides energy for muscle contraction.

• ATP

• Glucose

• Lactic Acid

• Oxygen

The electrical current generated by the change in charge across the muscle cell membrane.

• Action potential

• Resting potential

• Synaptic transmission

• Neurotransmitter release

A bundle of muscle fibers is a.

• Fascicle

• Tendon

• Ligament

• Neuron

The contractile unit of the muscle is the.

• Sarcomere

• Myofibril

• Muscle Fiber

• Tendon

Required to expose myosin binding sites on actin.

• Calcium ions

• Sodium ions

• Potassium ions

• Magnesium ions

The _ returns the muscle cell to its resting state.

• Sodium-potassium pump

• Calcium channel

• Chloride channel

• Magnesium pump