Muscular System

Front

What is the neurotransmitter that starts a muscle contraction?

Back

Acetylcholine is the neurotransmitter that initiates muscle contraction by binding to receptors on the muscle cell membrane.

Front

These people are marathon runners that run 26 miles. They have a high number of_________ fibers.

Back

Slow twitch fibers are more prevalent in marathon runners, as they are more efficient for endurance activities.

Front

What term is used to describe a bundle of muscle fibers?

Back

A fascicle is a bundle of muscle fibers surrounded by connective tissue.

Front

Identify the highlighted muscle: Gastrocnemius, Tibialis Anterior, Extensor Digitorum Longus, Plantaris.

Back

The Gastrocnemius is a major muscle in the calf that is involved in walking, running, and jumping.

Front

The actin is represented by the letter?

Back

C represents actin in muscle contraction diagrams.

Front

What is the primary function of the muscular system?

Back

The primary function of the muscular system is to facilitate movement of the body and maintain posture.

Front

What are the two main types of muscle tissue?

Back

The two main types of muscle tissue are skeletal muscle and smooth muscle.

Front

What is the role of myosin in muscle contraction?

Back

Myosin is a protein that interacts with actin to produce muscle contraction through the sliding filament model.

Front

What is the difference between fast twitch and slow twitch muscle fibers?

Back

Fast twitch fibers are designed for quick bursts of power and fatigue quickly, while slow twitch fibers are more endurance-oriented and resist fatigue.

Front

What is the sliding filament theory?

Back

The sliding filament theory explains how muscles contract by the sliding of actin and myosin filaments over each other.