Muscle Anatomy

Question 1

Types of muscles

Answer 1

1. Skeletal

• Striated
• Voluntary nerve control

1. Visceral

• Smooth
• Involuntary nerve control

1. Cardial

• Syncytium (multinucleated) or branch striated
• Voluntary / Involuntary nerve control

Question 2

Muscle Properties

Answer 2

1. Contractibility - the ability to shorten when innervated
2. Extensibility - the ability to be stretched beyond their normal resting length
3. Elasticity - the ability to rebound to their resting length after being stretched
4. Tonicity - a state of hardness of the muscle. When a muscle is exercised, more muscle fibers become active, and the muscle becomes firmer.

Question 3

Types of contractions

Answer 3

1. Muscle length shortens

• Human anatomy term: Isotonic
• Kinesiological term: Concentric

1. Muscle length does not change

• Human anatomy term: Isometric
• Kinesiological term: Static

1. Muscle length increases

• Human anatomy term: Isometric
• Kinesiological term: Eccentric