Contraction
This ion binds to troponin to remove tropomyosin from actin-myosin binding sites
What is calcium?
The thick filament
What is myosin?
The chemicals released by neurons for communication
What are neurotransmitters?
The thin muscle filament
What is Actin?
Synapse between motor neuron and muscle fiber
What is the neuromuscular junction?
The actual pulling of muscle filaments
What is powerstroke? or shortening of sarcoromere
Involuntary and unstriated muscle found walls of internal/hollow organs/structures
What is smooth muscle?
Increased sodium into a muscle cell causes this
What is depolarizing?
Muscle found in the heart
What is Cardiac?
Muscle fatigue can occur after a buildup of this in the tissues
What is lactate? commonly referred to as lactic acid
The degradation of this molecule provides the energy for muscle contractions
What is ATP?
Motor neuron and the muscle fibers under its control
What is a motor unit
Phases of a twitch contraction
What are latent phase, contraction phase, and relaxation phase
Individual skeletal muscles are separated from adjacent muscles by
What is Fascia?
Functions of this muscle include: muscle tone for posture, movement, maintenance of body temperature
What is skeletal muscle?
What is sliding filament theory?
the site of muscle attachment that is relatively stationary or tends to be proximal/ toward midline
What is origin?
The minimum strength of stimulus needed to stimulate a contraction of single muscle fiber
What is threshold stimulus?
Modified cell membrane of muscle cells
What is sarcolemma?
involuntary contraction and relaxation of smooth muscle that creates a wavelike motion
What is peristalsis?
Molecule that stores energy in the form of high energy phosphate bond to quickly produce ATP for short, intense exercise
What is creatine phosphate?
This is formed when actin and myosin bind
What is a cross-bridge?
Neurotransmitter that stimulates skeletal muscle
What is acetylcholine?
Structure found in cardiac muscle that allows depolarization to pass through from cardiac cell to cardiac cell
What are intercalated discs?
The gastrocnemius, soleus, and plantaris muscles combine to form the Achilles Tendon which connects to this bone
What is the calcaneus?