Types of Muscles
These muscles are voluntary
What is skeletal?
The ability to shorten when stimulated
What is contractability?
Prepares a myosin head for its power stroke
What is ATP?
Type of channel on the axon terminal is stimulated by an incoming action potential and allows Calcium to enter the axon
What is voltage-gated?
The ability to respond to a stimulus (from a motor neuron or hormone)
What is excitability?
Outer membrane found around the belly of the muscle
What is epimysium?
Comes in from a nerve cell to remove molecules blocking active sites
What is Calcium?
When Calcium ions enter the neuromuscular junction, this neurotransmitter is released across the synaptic cleft
What is acetylcholine?
These muscles are involuntary
What is smooth and cardiac
Covers a fascicle
What is perimysium?
During rigor mortis, __________ floods the muscle fibers but a lack of ____________ prevents them from detaching
Calcium, ATP
Causes you to become out of breath and your muscles begin to burn during a workout
What is lack of oxygen?
These muscle types are striated
What are skeletal and cardiac muscles?
Covers an individual muscle fiber
What is endomysium?
The amount of ATP used in a single myosin/actin cross-bridge cycle
What is one?
Separates one sarcomere from another
What is z-line or z-discs?
An example of where each type of muscle is found.
Skeletal - Connected to bone
Cardiac - Found in heart
Smooth - Make up internal organs
Four functions of muscles
What are produce movement, stabilize joints, maintain posture, generate heat?
Two types of myofilaments found in skeletal muscles
What are actin and myosin?
Two structures that block the active site on an actin filament
What are troponin and tropomyosin?
When myosin heads make a cross bridge and bend pulling the actin myofilament toward the center of the sarcomere
What is a power stroke?