Muscle system review

How many skeletal muscles are there in the human body?

• 640

• 300

• 400

• 500

What is the longest muscle in the human body?

• Sartorius

• Latissimus dorsi

• Biceps brachii

• Gluteus maximus

What is the primary function of skeletal muscles?

• To store minerals

• To provide structure

• To perform movements

• To protect internal organs

Muscles can only perform which type of action?

• Extend

• Rotate

• Pull

• Push

What is the smallest muscle in the human body?

• Sartorius

• Stapedius

• Pectoralis minor

• Gluteus minimus

What are the muscles that oppose the action of prime movers called?

• Antagonists

• Agonists

• Fixators

• Synergists

What is a motor unit?

• A group of muscles that perform the same action

• A single muscle fiber and its motor neuron

• The junction between a nerve and a muscle

• A group of muscle fibers innervated by a single motor neuron

What is the term for the maximum tension a muscle can achieve through rapid stimulation?

• Summation

• Tetanus

• Isotonic contraction

• Twitch

What type of muscle contraction occurs without changing the muscle's length?

• Concentric

• Eccentric

• Isotonic

• Isometric

Which muscle is responsible for the blinking of the eye?

• Orbicularis oculi

• Temporalis

• Zygomaticus

• Masseter