Muscular System

Smooth muscle has the following characteristic

• striations
• involuntary action
• strong contractions
• many nuclei

The muscle primarily responsible for a movement
is the

• prime mover .

• synergist.
• antagonist.
• origin.

Which muscle type is not striated?

• Skeletal
• Smooth
• Cardiac

Which muscle type is found in the heart?

• Skeletal
• Smooth
• Cardiac

Which muscle type is found in the internal organs, blood vessels, and airways?

• Skeletal
• Smooth
• Cardiac

Muscles always work in _____

• pairs
• groups of 3
• bones
• joints

Moving a limb away from midline

• Pronation
• Abduction
• Adduction
• Flexion

What connects skeletal muscle to bone?

• Tendons
• Ligaments
• Z lines
• Blood vessels

name the muscle shown in green in the image.

• trapezius

• deltoid

• latissimus dorsi

• sternocleidomastoid

• zygomaticus

Where are the actin filaments?

Answer explanation