Show:
Muscle Structure
Muscle Activation
Muscle Contraction
Tension Production
Potpourri
100
A bundle of muscle fibers.
What is a fascicle?
100
The site of Ca++ storage and release.
What is the sarcoplasmic reticulum?
100
The name of the condition that occurs as a result of your body running out of ATP after you die.
What is rigor mortis?
100
All of the muscle fibers that are controlled by a single motor neuron.
What is a motor unit?
100
The structure that carries the action potential to all parts of the muscle fiber.
What are the t-tubules?
200
The layer of connective tissue that surrounds the fascicles and contains the blood vessels and nerves.
What is the perimysium?
200
The neurotransmitter that is released from the synaptic terminal.
What is acetylcholine?
200
The longest phase of contraction (twitch).
What is relaxation phase?
200
A muscle that is stimulated so frequently that the relaxation phase is completely eliminated is said to be in this.
What is complete tetanus?
200
The connective tissue covering of the muscle fiber.
What is the endomysium?
300
This protein that makes up the thick filament.
What is myosin?
300
The channels that open up when the receptors detect ACh allow this ion to rush in to the muscle cell.
What is Na+?
300
The step of the contraction cycle that occurs when ATP binds to the myosin head.
What is cross-bridge detatchment?
300
The type of contraction in which tension is generated and the muscle changes length.
What is an isotonic contraction?
300
The type of contraction that is represented by a single stimulation/contraction/relaxation sequence.
What is a twitch?
400
The name for the muscle cell membrane.
What is the sarcolemma?
400
The site of muscle activation.
What is the neuromuscular junction?
400
This phase of contraction (twitch) sees no tension produced.
What is the latent phase?
400
The size of the motor units in the muscle of your thigh compared to those moving your eyes.
What is larger?
400
The step of the contraction cycle in which ATP is broken down into ADP and P.
What is the recocking phase?
500
The zones/bands that get smaller during muscle contraction, according to the sliding filament theory.
What are the I-bands and H-zones?
500
The structure that covers that actin at rest. It is moved out of the way when Ca++ binds to it.
What is Troponin?
500
True or false. Myosin needs ATP to bind to it after it is recocked to perform the power stroke.
What is false?
500
The muscle fiber type that produces that contracts the fastest, producing the most amount of power.
What are Type IIb (Fast Twitch) fibers.
500
The type of muscle fiber that have large glucose reserves and fewer mitochondria.
What are type IIb (fast twitch) fibers?