Muscle Physiology

part 1 (types)

What are the 7 functions of muscle

What are the 7 functions of muscle

1. Body Movement

2. Maintain Posture

3. Respiration

4. Produce body heat

5. Communication

6. Construction of organs and vessels

7. Heart Beat

What are the 4 properties of muscles

Contractility, Excitability, Extensibility and Elasticity

What is contractility?

ability to shorten when an adequate stimulus is received

What is excitability?

ability to receive and respond to a stimulus

what is extensibility?

ability to lengthen when an adequate stimulus is received

what is elasticity?

ability to return to standard shape

What are the 3 muscle types?

Skeletal Muscles, Cardiac muscles and Smooth muscles

Skeletal Muscles location, function, nuclei type and appearance

1. Attached to bone

2. Body movement

3. Voluntary Control

4. Striated

5. Multinucleate

Cardiac Muscle’s location, function, nuclei type, and appearance

1. Found in Heart

2. Involuntary Contraction

3. Single Nuclei

4. Intercalated disks

5. Circulate blood

Smooth Muscle’s location, function, nuclei type, and appearance

1. Found in blood vessels, glands, etc

2. Spindle Shaped

3. Single Nuclei

4. Involuntary contraction

5. No striations

What are the 4 muscle components?

Muscle, Fascicle, Muscle Fiber and Myofibril

what is a Muscle?

Groups of fascicle bundles

what is a Fascicle?

Groups of muscle fibers surrounded by connective tissue

what is a Muscle Fiber?

Single Muscle cell comprised of myofibrils

what is a Myofibril?

Contractile unit within muscle cell

____ muscle causes digestion of your food

smooth muscle

___ causes muscles to shorten

contractility

___ feature allows cardiac muscle cells to work in sync with one another

intercalated discs

___ muscle type has the longest cells and many nuclei?

Skeletal muscle

write the correct order from largest to smallest

muscle, fascicle, muscle fiber, myofibril, myofilament

___ is another name for single muscle cell

True