Muscular System

What is a characteristic of skeletal muscles?

• They cannot contract rapidly

• They are involuntary muscles

• They are responsible for movement and maintaining body posture

• They do not tire easily and do not need rest

How do skeletal muscles behave during activity?

• They contract slowly and with little force

• They can contract rapidly and with great force, but tire easily

• They can sustain long periods of activity without rest

• They do not generate heat

What is the shape of skeletal muscles?

• Spindle-like shape

• Thread-like shape

• Irregular shape

• Flat shape

Do skeletal muscles contain multiple nuclei?

• No, they contain a single nucleus

• Yes, they contain many nuclei

• No, they do not contain any nuclei

• Yes, but only two nuclei

What is a characteristic feature of skeletal muscles in terms of appearance?

• Smooth

• Striated (or striped)

• Monochrome

• Transparent

Which type of muscle is striated and is under voluntary control?

• Smooth Muscle

• Cardiac Muscle

• Skeletal Muscle

• None of the above

Which muscle type has branching fibers and is found in the heart?

• Skeletal Muscle

• Smooth Muscle

• Cardiac Muscle

• None of the above

Why are smooth muscles called "smooth"?

• Because they are under voluntary control

• Because they have a striated appearance

• Because they do not have a striated appearance

• Because they are found in the heart

Smooth muscles are considered involuntary because:

• Their movement can be controlled by conscious thought

• They are only found in the heart

• Their movement cannot be controlled by conscious thought

• They contract quickly

Where are smooth muscles found?

• Only in the heart

• In all the organs except the heart

• Exclusively in the blood vessels

• Only in the airways