Muscular System Test 2025

What is the name of the muscle #5 ( Plantar flexes foot and flexes knee) in this anterior view of the human muscular system below?

• gastrocnemius
• frontalis
• trapezius
• deltoid
• pectoralis major

Muscle names are based on Latin. Which criteria is not used to name a muscle?

• muscle strength
• Muscle size
• Muscle shape
• Location of muscle
• Muscle origin and insertion

How do muscles become fatigued?

• muscles are worked strenuously and the glucose supply is exhausted.
• ATP is no longer efficiently being used for cross-bridges
• Muscles begin to burn, causing you to stop exercising before cells are injured
• A difference occurs between the amount of oxygen available and the amount required and you are “out of breath”
• all the above

What is #9 on the anatomy of the muscle diagram below. (Filaments have rounded extensions called heads. These heads attach to the twisted actin filaments and pull on them.)

• myosin
• Muscle
• fascicle
• actin
• muscle fiber

13) When you do sit-ups, your rectus abdominus is the _________________ and the latissimus dorsi is the _________________.

• insertion; origin
• origin; insertion
• antagonist; prime mover
• prime mover; antagonist

Which membrane covers an individual muscle fiber

• endomysium
• epimysium
• perimysium

This is an explanation for how muscles contract to produce force. The actin and myosin filaments within the sarcomeres of muscle fibers bind to create cross-bridges and slide past one another, creating a contraction.

• muscle theory
• sliding filament theory
• actin and myosin theory
• cell theory

What is the name of the muscle #7 (Plantar flexes foot and flexes knee) in this posterior view of the human muscular system below?

• gastrocnemius
• gluteus medius
• soleus
• trapezius
• deltoid

What attaches muscle to bone?

• ligaments
• tendons
• sliding filaments
• sarcomeres

Muscles are either contracted or relaxed, with no in-between. The “gentleness” or “strength” of a muscle is determined by the ____________ of fibers engaged.

• thickness
• length
• number
• location