The Muscular System

Open Ended

What do you already know about how muscles help our bodies move?

Multiple Choice

What are the three types of muscle tissues found in the human body?

• Smooth, cardiac, connective

• Smooth, nervous, skeletal

• Cardiac, epithelial, skeletal

• Smooth, skeletal, cardiac

Multiple Choice

Which type of muscle tissue is responsible for moving substances through the digestive tract?

• Cardiac muscle

• Smooth muscle

• Skeletal muscle

• Connective tissue

Fill in the Blanks

Cardiac muscle tissue is found in the walls of the

.

Multiple Select

Which of the following are characteristics of cardiac muscle cells?

• Single nucleus

• Striated appearance

• Branched fibers

• Voluntary control

Multiple Choice

Which type of muscle tissue attaches to bones and moves parts of the body?

• Skeletal muscle tissue

• Cardiac muscle tissue

• Smooth muscle tissue

• Connective tissue

Multiple Choice

What are the main structural features of skeletal muscle tissue described in the images?

• Many nuclei, no striations, fibers grouped in tendons

• Single nucleus, no striations, fibers grouped in bundles

• Many nuclei, striations, fibers grouped in fascicles

• Single nucleus, striations, fibers grouped in fascicles

Multiple Choice

What causes the striated appearance of skeletal muscle fibers?

• The arrangement of actin and myosin in bands

• The presence of collagen fibers

• The number of nuclei in each cell

• The attachment to bones

Multiple Choice

Which of the following statements about the attachment and movement of skeletal muscles is correct?

• Skeletal muscles are attached to bones by tendons and stretch across joints to enable movement.

• Skeletal muscles are attached to bones by ligaments and do not cross joints because the space is too wide.

• Skeletal muscles are attached to the inner bone marrow by collagen.

• Skeletal muscles are not involved in the movement of bones. That function is performed by tendons

Fill in the Blanks

Skeletal muscles are attached to bones by tough fibrous cords called

.

Multiple Choice

Why is it important for humans to have a muscular system?

• It's the only thing that protects our organs.

• It helps us digest food only.

• It helps us move, maintain posture, and produce heat.

• It is not important for our survival.

Multiple Choice

What is the difference between the origin and insertion of a muscle?

• Origin is where the muscle attaches to the stationary bone, and insertion is where it attaches to the moving bone.

• Origin is where the muscle attaches to the moving bone, and insertion is where it attaches to the stationary bone.

• Origin and insertion are both points where the muscle attaches to the same bone. The difference between them is not actually the location.

• Origin is the point where the muscle contracts, and insertion is where it relaxes. That's the only difference.

Multiple Choice

What is one key difference between skeletal muscles and other types of muscles in the human body?

• Skeletal muscles are under voluntary control, while other types are not.

• Skeletal muscles are found only in the heart.

• Skeletal muscles do not help in movement.

• While we cannot control skeletal muscles, the other two muscle types are under our conscious control.