The Muscular System Quiz

Which type of muscle tissue is responsible for keeping the heart beating?

Cardiac muscle

What are the two main players in muscle contraction?

Actin and myosin

What are muscle cells also called?

Muscle fibers

What is the term used to describe the ability of cardiac muscle to react to signals?

Excitability Signup and view all the answers

Which type of muscle tissue has the ability to stretch when needed?

All types of muscle tissue Signup and view all the answers

Which trait describes the ability of cardiac muscle to get shorter when it's told?

Contractibility Signup and view all the answers

Which trait allows cardiac muscle to stretch when needed?

Extensibility Signup and view all the answers

Which type of muscle tissue is known for its large, powerful cells?

Skeletal muscle Signup and view all the answers

What is the function of mitochondria in muscle cells?

To provide energy Signup and view all the answers

What is the role of nuclei in muscle cells?

To control muscle movement Signup and view all the answers

Which type of tissue keeps all the muscle cells together?

Connective tissue Signup and view all the answers

What is the name of the storage room that holds important substances for muscle work such as calcium ions?

Sarcoplasmic reticulum Signup and view all the answers

Which layer of muscle tissue is responsible for holding the muscle fibers together, similar to a plastic bag holding straws together?

Perimysium Signup and view all the answers

What is the outer layer, in skeletal muscle, that wraps around the entire muscle, providing strength and protection?

Epimysium Signup and view all the answers

Which type of muscle helps you move your bones, skin, and create facial expressions?

Skeletal muscle Signup and view all the answers

What are the tiny units inside the muscle cell that are lined up end to end?

Myofibrils Signup and view all the answers

Which type of tissue connects muscles to bones or other muscles?

Aponeuroses Signup and view all the answers

What is the function of aponeuroses in the body?

To hold muscles in the right position Signup and view all the answers

How can tendons be described?

Strong, fibrous bands that attach muscles to bones Signup and view all the answers

Which type of muscle tissue is found in the walls of organs and hollow structures?

Smooth muscle Signup and view all the answers

What shape are smooth muscle cells?

Spindled Signup and view all the answers

Which type of muscle tissue works automatically, without conscious control?

Both B and D Signup and view all the answers

What is the appearance of smooth muscle cells?

Smooth and even Signup and view all the answers

How many control centers does each smooth muscle cell have?

One Signup and view all the answers

Where is smooth muscle found in the body?

All over the body Signup and view all the answers

What are the tiny units inside smooth muscle cells that help them contract?

Actin and Myosin Signup and view all the answers

Where are multiunit smooth muscles primarily found in the body?

Blood vessels Signup and view all the answers

Which type of smooth muscle requires instructions from the autonomic nervous system?

Multiunit Smooth Muscle Signup and view all the answers

Which type of muscle tissue is found covering the walls of hollow organs?

Visceral smooth muscle Signup and view all the answers

What happens to smooth muscle when it is stretched?

It contracts Signup and view all the answers

Which type of muscle tissue is exclusively found in the heart?

Cardiac muscle Signup and view all the answers

What is the shape of cardiac muscle cells?

Small and branching Signup and view all the answers

How many control centers (nuclei) does each cardiac muscle cell have?

One Signup and view all the answers

Cardiac muscle has a striped appearance: True or False?

True Signup and view all the answers

What is the role of intercalated disks in cardiac muscle cells?

To connect heart muscle cells and ensure they work together Signup and view all the answers

Which type of muscle tissue doesn't need outside signals to start contracting?

Cardiac muscle Signup and view all the answers

What is the pattern of contractions in cardiac muscle?

Rapid and wavelike Signup and view all the answers

Which two systems innervate (connect) the cardiac muscle?

Sympathetic and parasympathetic Signup and view all the answers

Which system speeds up the cardiac muscle?

Sympathetic Signup and view all the answers

Which term is used to describe the tiny structures inside a muscle cell that act as the inner framework?

Myofibrils Signup and view all the answers

What shape are muscle cells?

Straw-like Signup and view all the answers

What is the function of the nuclei in a muscle cell?

Control centers Signup and view all the answers

Which type of myofilaments are responsible for contractions in sarcomeres?

Both thick myosin and thin actin Signup and view all the answers

What are the visible bands in sarcomeres called?

A band, I band, and Z line Signup and view all the answers

What is the function of Z lines in muscles?

To help muscles work smoothly Signup and view all the answers

What happens to the A band when you flex your muscles?

It gets shorter Signup and view all the answers

Which part of the sarcomere contains actin but no myosin?

The I band Signup and view all the answers

What happens to the I band when your muscles contract?