Muscle Unit Review

All of the following are purposes of the muscular system except:

• Body movement

• Body shape

• Heat production

• Blood cell production

What type of muscle is found in the walls of internal organs?

• Skeletal muscle

• Smooth muscle

• Cardiac muscle

What type of muscle is under voluntary control?

• Skeletal muscle

• Smooth muscle

• Cardiac muscle

The cardiac muscle requires continuous supply of oxygen to function.

• True

• False

Tendons connect bone to bone, while ligaments connect muscle to bone.

• True

• False

What is the end of the muscle that attaches to a fixed structure called?

• Insertion

• Fascia

• Origin

• Tendon

Muscle fatigue is caused by the buildup of which substance due to vigorous exercise?

• Glucose

• Calcium

• Lactic acid

• Acetylcholine

Which of the following is a characteristic of all muscles?

• They can only push, not pull

• They are always under voluntary control

• They have the ability to contract and return to their original shape

• They are all connected directly to bones

Which muscle is responsible for chewing?

• Zygomaticus

• Masseter

• Orbicularis oris

• Sternocleidomastoid

What type of movement decreases the angle of a joint by bringing two body parts closer together?

• Extension

• Flexion

• Abduction

• Rotation