Potpourri
CT layer that covers each individual muscle fiber.
Endomysium
Where a motor neuron and skeletal muscle connect.
Neuromuscular junction
Smallest contractile unit in a muscle cell
Sarcomere
The energy currency of the cell.
ATP
I have multiple nuclei, striations, and a long cylindrical shape.
Skeletal muscle
This is the neurotransmitter that stimulates muscle contraction.
Acetylcholine (ACh)
This fiber-like organelle is made of repeating subunits of myosin and actin.
Myofibril
Think filament =
Thin filament =
Think = myosin
Thin = actin
Sally is running a 10 mile race. This is the most likely pathway her muscles are using for ATP production.
Aerobic Respiration
I am uninucleated, have striations, and intercalated discs.
Cardiac muscle
_____________ is released form the sarcoplasmic reticulum, floods the muscle fiber, and binds to troponin in order to expose binding sites on actin myofilaments.
Calcium, Ca2+
Where the action potential travels down in a muscle cell.
T-tubule
This portion of the sarcomere is where thick and thin filaments overlap, also called the "dark band"
A band
Where does aerobic respiration take place in the muscle cell?
Mitochondria
Only found in hollow organs.
Smooth muscle
Skeletal muscles must connect to at least 2 points. These bones are called the _________ and __________.
Origin and Insertion
This specialized structure controls what enters and exits the muscle fiber. It is similar to a plasma membrane.
Sarcolemma
This area of the sarcomere only contains myosin myofilaments.
H zone
This molecule is found in muscle tissue and can donate a high energy phosphate to ADP in order to generate ATP during brief, powerful activities.
Creatine phosphate
There are roughly 640 of me.
Skeletal muscle
This occurs when a body stiffens and becomes unmovable after death.
Rigor mortis
What is the level of organization of muscle from largest to smallest?
Whole muscle - muscle fascicle - myofiber - myofibril- myofilaments
I band
This type of respiration uses glucose to create ATP.
Anaerobic
I am involuntary.
Smooth and Cardiac muscles