The Muscular System_Skeletal Muscle

Front

What is the main effect of strength training?

Back

Muscle Hypertrophy: The increase in muscle size due to strength training.

Front

What is the plasma membrane of a skeletal muscle cell called?

Back

Sarcolemma: The membrane that surrounds a muscle cell.

Front

How are myofilaments characterized?

Back

Actin is light and thin; Myosin is dark and thick.

Front

What is the name of the structure that stores neurotransmitters?

Back

Synaptic vesicles: Small sacs that store neurotransmitters at the nerve endings.

Front

Which muscle type is found in your stomach, bladder, and intestines?

Back

Smooth muscle: Involuntary muscle found in internal organs.

Front

What is the basic functional unit of a muscle called?

Back

Sarcomere: The segment of a myofibril that contracts.

Front

What is the role of myosin in muscle contraction?

Back

Myosin interacts with actin to produce muscle contraction.

Front

What is the function of the sarcoplasmic reticulum in muscle cells?

Back

It stores calcium ions, which are essential for muscle contraction.

Front

What is the difference between voluntary and involuntary muscles?

Back

Voluntary muscles are controlled consciously (e.g., skeletal muscles), while involuntary muscles operate automatically (e.g., smooth and cardiac muscles).

Front

What is the role of acetylcholine in muscle contraction?

Back

Acetylcholine is a neurotransmitter that triggers muscle contraction by binding to receptors on the sarcolemma.