09 - Muscle Tissue: Types of Muscle Fibers

Front

What are the two main types of muscle fibers?

Back

Slow Twitch and Fast Twitch.

Front

What is the primary function of Slow Twitch muscle fibers?

Back

They are designed for endurance and sustained activities, using aerobic metabolism.

Front

What is the primary function of Fast Twitch muscle fibers?

Back

They are designed for quick bursts of power and speed, using anaerobic metabolism.

Front

What is myosin ATPase activity?

Back

It refers to the enzyme activity that influences the speed of muscle contraction.

Front

What percentage of slow twitch muscle fibers can marathon runners have?

Back

Up to 80% or more.

Front

What type of muscle fiber is abundant in muscles responsible for posture?

Back

Slow fibers (slow oxidizing).

Front

What is the primary pathway of ATP synthesis in Fast Twitch fibers?

Back

Anaerobic glycolysis.

Front

What is myoglobin and its role in muscle fibers?

Back

Myoglobin is a protein that stores oxygen in muscle cells, important for aerobic respiration.

Front

What are intermediate muscle fibers?

Back

They have characteristics of both slow and fast twitch fibers, providing a balance of endurance and power.

Front

How does glycogen storage affect muscle performance?

Back

Higher glycogen stores can enhance performance in high-intensity, short-duration activities.