Muscle Anatomy Quiz

What percentage of an adult's body weight is made up of muscles?

• 25%

• 35%

• 45%

• 55%

What are muscles made up of?

• Bundles of fibers

• Sheets of tissue

• Layers of fat

• Chains of cells

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-3

What is the role of actin and myosin in muscle contraction?

• They provide energy

• They slide, allowing contraction

• They store nutrients

• They transmit signals

What is the result of muscle irritability in terms of electrical activity?

• Generation of heat

• Transmission of sound

• Generation and transmission of an electrical current

• Absorption of light

Which muscle type is known for its quick response and prompt relaxation?

• Cardiac muscle

• Visceral muscle

• Skeletal muscle

• Smooth muscle

Which characteristic of muscles refers to their ability to be stretched?

• Contractility

• Extensibility

• Elasticity

• Rigidity

Which muscle characteristic is defined as the ability to shorten forcefully?

• Extensibility

• Elasticity

• Contractility

• Rigidity

Which characteristic of muscles allows them return to resting position?

• Contractility

• Extensibility

• Elasticity

• Rigidity

Which of the following is a characteristic of skeletal muscles?

• Involuntary control

• Mononucleated cells

• Non-striated appearance

• Striations

Ability of a muscle fiber to respond rapidly to electrical or chemical signals

• contractibility

• excitability

• extensibility

• elasticity