Muscle Tissue
This muscle tissue is involuntary and found in digestive organs.
Smooth Muscle Tissue
This connective tissue sheath surrounds the entire muscle belly
Epimysium
This is the fluid-filled gap between the nerve ending and the muscle fiber.
Synaptic Cleft or Synapse
Binding of calcium to this protein moves the "blocking" out of the way on the actin filament.
Troponin
Also known as Type I, these fibers are built for endurance and are resistant to fatigue.
Slow Twitch
This muscle tissue is striated and attached to bones of the skeleton.
Muscle fibers are grouped into bundles called these.
Fascicles
This specific chemical messenger is released by the motor neuron to signal the muscle to contract
Acetylcholine
This protein acts as the "shield," covering the binding sites on actin when the muscle is relaxed
Tropomyosin
These Type IIb fibers are used for short, powerful bursts of speed but tire out quickly.
Fast Twitch
This muscle tissue is involuntary, striated and found in the heart.
cardiac muscle tissue
This is the scientific name for an individual muscle cell.
muscle fiber
These small sacs inside the axon terminal store the neurotransmitters
Vesicles
In order for the myosin head to detach from actin, a new molecule of this must bind to it.
ATP
Slow-twitch fibers appear dark red because they contain high amounts of this oxygen-storing pigment.
Myoglobin
This muscle tissue is found in blood vessels and is responsible for when you blush
This delicate connective tissue sheath surrounds each individual muscle fiber.
These deep invaginations of the sarcolemma carry the electrical signal into the interior of the muscle fiber
t-tubules
This condition occurs after death when ATP is no longer produced, preventing myosin from detaching from actin
Rigor Mortis
These fibers appear white because they have low levels of myoglobin and rely on anaerobic glycolysis for energy.
fast twitch
This muscle tissue allows you to move within your environment.
Skeletal Muslce
This "middle" layer of connective tissue wraps around a fascicle
Calcium is stored in this structure and must be released in order for a muscle to contract.
Sarcoplasmic Reticulum
This is the functional, contractile unit of a muscle fiber, spanning from Z-disc to Z-disc.
sarcomere
These "Type I" fibers are the first to be recruited for low-intensity activities like walking or standing.
slow twitch