Anatomy muscle tissue SA

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Epimysium

Epimysium

Dense irregular connective tissue, surrounds the whole muscle, outermost layer

Troponin

Regulatory protein that turn contraction on and off

Conductivity

Ability to propagate electrical signals over membranes

Titin

Structural protein; anchors thick filament to M line and Z disc

Endomysium

Separates individual muscle cells

Sarcoplasm

The muscle cell cytoplasm and contains large amounts of glycogen

Excitability

Respond to chemicals released from nerve cells

Sarcoplasmic reticulum

Encircles each myofibril, stores calcium ions in relaxed muscles

Sarcolemma

The plasma membrane of the cell

Troponin, tropomyosin, Actin

Thin filaments are made up of

Smooth

Which type of muscle tissue is found in your GI tract?

Myomesium

Connects adjacent thick filaments to one another

Sarcoplasmic reticulum

System of tubular sacs similar to smooth ER in nonmuscle cells

cardiac, smooth, skeletal

What are the types of muscle cells

Sarcoplasmic reticulum

Stores Calcium in a relaxed muscle

Myosin

Functions as a motor protein, push or pull various cellular structures to achieve movement

Nebulin

Helps to align the thin filaments in the sarcomere.

Thermogenesis

Involuntary contractions of skeletal muscles; heat generation

Cardiac

Which type of muscle tissue is only found in the heart?

Elasticity

Property allowing muscle tissue to return to its original shape

Contractility

Property allowing muscle to shorten forcefully when stimulated by an action potential

Perimysium

Dense irregular connective tissue, surround bundles of 10-100 muscle cells

Extensibility

Ability to be stretched without damaging the tissue

Dystrophin

Helps transmit the tension generated by the sarcomeres to the tendons

Actin (thin filament)

What is A

Myosin (thick filament)

What is B

Z disc

What is C

H zone

What is D

Z disc

What is E

I band

What is F

A band

What is G

I band

What is H

M Line

What is I

Sarcomere

What is J

Tendon

A

Epimysium

B

Perimysium

C

Fascicle

D

Muscle Fiber Cell

E

Sarcolemma

F

Deep Fascia

G

Blood Vessels

H

Endomysium

I

Blood Capillary

J

Motor neuron

K

Myofibril

L

twitch

A

wave summation

B

unfused incomplete tetanus. muscle contraction that does not have a rest between stimuli

C

fused complete tetanus. muscle contraction that has rest

D

cardiac muscle tissue

what type of muscle tissue is this

smooth muscle tissue

what type of muscle tissue is this

skeletal muscle tissue

what type of muscle tissue is this

sarcolemma

what is the plasma membrane of the cell

sarcoplasm

what is the muscle cell cytoplasm and contains a large amount of glycogen for energy production (synthesis of atp) and myoglobin for oxygen storage

sarcoplasmic reticulum

what is a system of tubular sacs siilar to smooth ER in nonmuscle cells that stores CA+2 in a relaxed mode

myosin

functions as a motor protein, push or pull various cellular structures to achieve movement by converting chem energy in ATP to the mechanical energy of motion

Slow Oxidative fibers (slow twitch)

least powerful type of muscle fiber, red, generate ATP by aerobic cellular respiration, resistant to fatigue, prolonged contractions for long term activities

muscle tone

involuntary contraction of a small number of motor units (alternately active and inactive in a constantly shifting pattern). Keeps muscle firm even though relaxed and does not produce movement

muscle tone

small amount of tension in the muscle due to weak involuntary contracts of its motor units at rest. Essential for blood pressure maintenance

hypotonia

decreased or lost muscle tone (muscles are flacid, loose, and affected limbs are hyperextended)

hypertonia

increase in muscle tone (increased stiffness associated with tendon reflexes)

motor recruitment

increase in the number of active motor units. Prevents fatigue and helps provide smooth muscle contraction.

fire asynchronously, some active some relaxed, delays muscle fatigue so contraction can be sustained

smaller units = smaller contractments

oxygen debt (EPOC)

refers to added oxygen taken into body after exercise.

extra oxygen: 1. converts lactic acid back to glycogen in the liver 2. re-synthesize creatine phosphate and ATP in muscle fibers 3. replace oxygen removed from myoglobin

mitochondria

A

Z disc

B

A Band

C

I band

D

Nucleus

E

myofibrils

F

sarcoplasm

G

sarcolemma

H

transverse tubule

I

terminal cisternae

J

Triad

K

Sarcoplasmic reticulum

L

openings into transverse tubules

M