Muscle Physiology

part 1 (types)

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