Muscle Unit Review

Sarcomeres are separated from one another by

• Thick filaments

• A band

• Z-lines

• Thin filaments

a function of muscle tissue is __ production

• Calcium

• Vitamin D

• Heat

• Energy

this muscle is a major abductor of the arm

• Pectoralis Major

• Biceps brachii

• Triceps brachii

• Deltoideus

Increasing the angles between bones is achieved by

• Extension

• Flexion

• Abduction

• Adduction

substance absolutely necessary for muscle contraction

• ATP (energy)

• Potassium

• Calcium

• Sugar

Bending the foot upward involves

• Pronation

• Supination

• Dorsiflexion

• Plantar flexion

An electrical signal that travels from nerve to muscle to start contraction

• Acetylcholine

• Impulse

• Sodium

• Calcium

Structure made of connective tissue that surrounds muscle fascicles is

• Myofibril

• Tendon

• Perimysium

• Endomysium

The structure storing calcium in the skeletal muscle fibers at rest is the

• T-tubule

• Synaptic vessicle

• Sarcoplasmic reticulum

• Sarcolemma

Muscle that pulls on the radius to rotate it without moving the humerus

• brachioradialis

• flexor carpi radialis

• extensor carpi radialis

• pronator teres