Skeletal Muscle Structure Quiz

Which of the following is the smallest structural unit of a skeletal muscle?

• Muscle fiber

• Myofibril

• Fascicle

• Whole muscle

Arrange the following structures in order from smallest to largest in skeletal muscle: myofibril, muscle fiber, fascicle, whole muscle.

• Fascicle, myofibril, muscle fiber, whole muscle

• Myofibril, muscle fiber, fascicle, whole muscle

• Muscle fiber, myofibril, whole muscle, fascicle

• Whole muscle, fascicle, muscle fiber, myofibril

What is the main function of cardiac muscle tissue in the body?

• To move bones

• To pump blood

• To digest food

• To produce hormones

Imagine a scenario where a person is unable to move their limbs, but their heart continues to beat normally. Which muscle tissue is most likely still functioning properly?

• Skeletal muscle

• Cardiac muscle

• Smooth muscle

• Nervous muscle

Besides movement, what are other functions of the muscular system?

• Maintain posture, stabilize joints, and generate heat

• Produce hormones, digest food, and filter blood

• Store minerals, produce blood cells, and protect organs

• Transmit nerve impulses, absorb nutrients, and regulate pH

Why do muscles need ATP?

• To contract

• To relax

• To grow

• To divide

How does muscle contraction help maintain homeostasis in the body?

• By producing heat to keep body temperature steady

• By absorbing nutrients from food

• By storing excess water

• By filtering toxins from the blood

Which type of muscle tissue is striated and found in the heart, contracting involuntarily to pump blood?

• Cardiac

• Smooth

• Skeletal

• Connective

Which feature is commonly observed in cardiac muscle tissue but not in skeletal muscle tissue?

• Branching

• Striations

• Many nuclei

• Long fibers

If you observe a muscle tissue with no striations and unclear cell borders, which type of muscle tissue is it most likely to be?

• Smooth

• Skeletal

• Cardiac

• None of the above