What are groups of fibers, or cells, that are bound together and have the ability to contract?

• bone

• muscle

• epithelium

Almost all the muscle fibers you will ever have were present at birth.

• True

• False

What is a ring-shaped muscle that relaxes or tightens to open or close a passage or opening in the body?

• sphincter

• perimysium

• sarcomere

• fascicle

What is the most common job of smooth muscle?

• squeeze

• filter

• absorb

• aponeurosis

Which contractions are NOT under conscious control, rather it contracts by itself?

• involuntary

• voluntary

What are structures that are only found in cardiac muscle cells and connect these cells together?

• intercalated discs

• sarcomeres

• intervertebral discs

• actin

What is a “flat tendon” that attaches muscle to muscle?

• ligament

• aponeurosis

• sarcoplasm

• fascicle

tendon, ligament, squeeze, contract

• ligament

• to shorten

• tendon

• attach muscle to bone

• contract

• attach bone to bone

• squeeze

• smooth muscle job

Describe smooth muscle. **pick the THREE correct items.

• look like an eye or an almond (tapered ends)

• 1 nuclei in middle of cell

• found in hollow organs and blood vessels

• contains multiple nuclei along outside of cell

• found in the heart

Describe cardiac muscle cells. **pick the THREE correct items.

• look like an eye or an almond (tapered ends)

• can be branched or not branched

• found in hollow organs and blood vessels

• 1 or 2 nuclei in middle of cell

• found in the heart