Ugh Work Flashcards
What chemical helps to regenerate ATP?
Creatine phosphate
Skeletal muscles are responsible for moving ___________
Bones
Muscle fibers are made of individual fibers (not filaments) called ___________
Myofibrils
Connective tissue that surrounds fascicles is ___________
Perimysium
Poisons such as botulism that prevent the release of acetylcholine would cause muscles to ____________
Become paralyzed
What type of muscles are: Primarily voluntary ___________ Found in the heart ___________ Found in the digestive tract ___________
Skeletal muscle
Cardiac muscle
Smooth muscle
What neurotransmitter is associated with the muscles?
Acetylcholine
What cell organelle provides the ATP needed for muscle activity?
Mitochondrion
The gap between the nerve and the muscle is called the ___________
Synaptic cleft
What is hypertrophy? Atrophy?
Hypertrophy: Increase in muscle size
Atrophy: Decrease in muscle size
A person who has a disease that inhibits the production of cholinesterase would have what kind of symptoms?
Prolonged muscle contraction or spasm
Cholinesterase is an enzyme that breaks down ___________
Acetylcholine
During a muscle contraction, cross-bridges form between what two structures?
Myosin and actin
In a sarcomere, the I band is made of ___________ and the A band is made of ___________
I band: Actin
A band: Myosin
The dark and light fibers of the muscles give cells a ___________ appearance.
Striated
The energy source for muscle contraction is ___________
ATP
Vesicles in the motor neuron store what substance?
Acetylcholine
When recruitment occurs, the number of motor units being activated [decrease / increase].
Increase
Sustained contraction of individual fibers, even when muscle is at rest is known as ___________
Muscle tone
The immovable end of the muscle is the ___________
Origin
The movable end of the muscle is the ___________
Muscle fatigue is likely due to a buildup of ___________
Lactic acid
A sarcomere is defined as the region between two ___________
Z lines
The condition where a body becomes stiff after death is called ___________
Rigor mortis
When ATP has been used, it becomes ___________
ADP (Adenosine diphosphate)
What is a motor unit?
A motor neuron and all the muscle fibers it controls
Myofibrils are composed of ___________
Myofilaments (actin and myosin)
The muscle fiber membrane is specialized to form a ___________ at the neuromuscular junction.
Motor end plate
Which type of connective tissue surrounds fascicles (bundles)? ___________
Perimysium
What type of tissue surrounds the entire muscle? ___________
The substance that crosses the gap between a neuron and a muscle fiber is the ___________
Acetylcholine
Tendons connect ___________ to ___________
Muscle to bone
Bundles of muscle fibers are called ___________
Fascicles
The minimum amount of stimulus required for a muscle contraction to occur is the ___________
Threshold stimulus
What model explains how muscles contract?
Sliding filament model
The A bands are [light / dark], whereas the I bands are [light / dark].
A bands: Dark
I bands: Light
The muscle fiber membrane is called the ___________
Sarcolemma
The transport network of the muscle is called the ___________
