Muscle System Introduction

What is a skeletal muscle?

• A muscle found in the heart

• A muscle attached to bones

• A muscle involved in involuntary movements

• A muscle responsible for peristalsis

Which of the following best describes cardiac muscle characteristics?

• Voluntary control, striated appearance

• Involuntary control, branched appearance, intercalated discs

• Involuntary control, smooth appearance

• Voluntary control, cylindrical appearance

What are the main characteristics of smooth muscle?

• Striated appearance, voluntary control

• Involuntary control, branched appearance, intercalated discs

• Spindle-shaped cells, involuntary control

• Cylindrical appearance, voluntary control

What are the functions of muscles?

• Production of body heat

• Generation of movement

• Maintenance of posture and body position

• All of the above

Which of the following is NOT a property of muscle tissue?

• Excitability

• Conductivity

• Absorptivity

• Contractility

What are the connective tissues of muscle?

• Endomysium, perimysium, epimysium

• Ligaments, tendons, cartilage

• Fascia, aponeurosis, synovium

• Dermis, epidermis, hypodermis

Define endomysium, perimysium, and epimysium.

• Types of muscle fibers

• Connective tissue layers surrounding muscles

• Nerve endings in muscle tissue

• Muscle contraction proteins

Intrinsic muscles are characterized by:

• Origin elsewhere but acts on a specific region

• Both origin and insertion contained within a particular region

• Attaching muscle to bone via tendons

• None of the above

What is the structure and function of fasciae?

• They are muscle fibers responsible for contraction

• They are connective tissue layers surrounding muscles

• They are sensory receptors in muscle tissue

• They are energy-storing molecules in muscle cells

What are the five types of muscle fascicles?

• Fusiform, parallel, triangular, pennate, circular

• Epimysium, perimysium, endomysium, fascia, tendon

• Isotonic, isometric, eccentric, concentric, static

• Slow oxidative, fast oxidative, fast glycolytic, intermediate, cardiac