Unit 2, Lesson 4. Types Of Muscles

1. Every human body has an uncountable number of this basic unit of a muscle known as

2. Slow-twitch muscles are needed for

3. A group of muscle fibers responsible for a specific movement is called

4. When a muscle fiber contracts as much as it can it is called the

5. Select the answer below the best fists the following description. Voluntary, come in pairs, attach to the bones through tendons, and made up of long, cylindrical fibers.

6. Select the answer below that best fits the following description. Involuntary, found in internal organs, and can stretch or maintain tension for long periods of time.

7. Select the answer below that best fits the following description. Involuntary and only found in the heart.