Anatomy Chapter 8 The Muscular System

Front

What is the role of calcium in muscle contraction?

Back

Calcium enables actin and myosin to form cross bridges, which is essential for muscle contraction.

Front

What protein in muscle cells is responsible for storing oxygen?

Back

Myoglobin is the protein that stores oxygen in muscle cells.

Front

What type of muscle cell is characterized as striated, voluntary, and has multiple nuclei located at the periphery?

Back

Skeletal muscle cells are striated, voluntary, and have multiple nuclei located at the periphery.

Front

How does cardiac muscle function similarly to skeletal muscle?

Back

Both cardiac and skeletal muscles contract and relax.

Front

What is the term for moving a limb away from the midline of the body?

Back

Abduction is the term for moving a limb away from the midline.

Front

What are the three types of muscle tissue in the human body?

Back

The three types of muscle tissue are skeletal, cardiac, and smooth muscle.

Front

What is the primary energy source for muscle contraction?

Back

Adenosine triphosphate (ATP) is the primary energy source for muscle contraction.

Front

What is the function of myofibrils in muscle cells?

Back

Myofibrils are responsible for muscle contraction and are made up of sarcomeres.

Front

What is the basic functional unit of a muscle called?

Back

The basic functional unit of a muscle is called a sarcomere.

Front

What is the difference between voluntary and involuntary muscles?

Back

Voluntary muscles are under conscious control (e.g., skeletal muscles), while involuntary muscles operate without conscious control (e.g., cardiac and smooth muscles).