Multiple Select Question Select all that apply What are characteristics of Type 2X muscle fibers? They are oxidative fibers. They are slow-twitch fibers. They are fast-twitch fibers. They are glycolytic fibers. Need help? Revlew these concept resources.

Question

Multiple Select Question Select all that apply What are characteristics of Type 2X muscle fibers? They are oxidative fibers. They are slow-twitch fibers. They are fast-twitch fibers. They are glycolytic fibers. Need help? Revlew these concept resources.

Answer 1

To address the question about the characteristics of Type 2X muscle fibers, let's break down the options given:1. **They are oxidative fibers.**2. **They are slow-twitch fibers.**3. **They are fast-twitch fibers.**4. **They are glycolytic fibers.****Explanation**:- **Oxidative fibers** are primarily associated with endurance and are more characteristic of Type I (slow-twitch) fibers, which are efficient at using oxygen to generate ATP for long-duration, less intense activities.- **Slow-twitch fibers** (Type I) are indeed designed for endurance and are not fast-twitch fibers, thus not primarily associated with Type 2X muscle fibers.- **Fast-twitch fibers** are known for their quick and powerful contractions, suited for short, high-intensity activities. This is a hallmark of Type II fibers, including Type 2X.- **Glycolytic fibers** refer to fibers that predominantly generate energy through glycolysis, a pathway that breaks down glucose for energy without the need for oxygen. This is typical of fast-twitch fibers like Type 2X, which rely on glycolysis for quick bursts of energy.**Answer**: Based on the characteristics described, Type 2X muscle fibers are:- Not oxidative fibers.- Not slow-twitch fibers.- **They are fast-twitch fibers.**- **They are glycolytic fibers.**