During this action, the actin and myosin slide towards one another, causing a decrease in length from Z disk to Z disk
What is Power Stroke
100
The primary contributor of calcium during contraction:
What is the sarcoplasmic reticulum
100
Na+ and K+ want to travel which direction in regards to their concentration gradient?
What is down
100
The receptor end of a neuron is termed
What is a Dendritic end
100
A sudden shift in desire of contraction (returning to a relaxed state) would involve release of what chemical?
What is AcH esterase
200
This region of the sarcomere is the only one which undergoes no changes during contraction
What is the A band
200
Although contraction of muscle does cause the a decrease in length, the individual muscle fibers do not undergo this
What is shortening
200
The sudden Efflux of this element is primarily responsible for bringing the intracellular environment back to about -95
What is K+
200
Neurons create and store these substances, which are responsible for the transduction of the electric Action Potential
What are Neuro Transmitters
200
An effective dose of AcH specific receptor inhibitor would result in?
What is non contraction of muscle
300
When the myosin head is attached to the myosin binding site on actin, prior to the initiation of power stroke, these can be found attached to the head.
What are ADP &Pi
300
The terminal citernae (2 of the three parts of a triad) are extensions of this
What is the sarcoplasmic reticulum
300
The depolarization of the muscle surface is initiated by
What is the attachment of NT (AcH) to the NAcH receptors?
300
Diffusion of the Neuro Transmitter's is made possible primarily by
What is influx of Ca2+ via voltage gated calcium channel.
300
What is the N.AcH receptor? (specific name)
What is a ligand gated ion channel
400
Calcium is of most importance for this particular act during excitation contraction coupling
What is binding the the troponin C of the troponin tropomyosin complex, shifting the complex on the actin, exposing the myosin head binding site.
400
Action potentials transmitted along the surface of a muscle eventually find their way into these structures
What are T tubules
400
A stimulation below this voltage will result in no contraction of the muscle
What is -60
400
The last neuron sitting on top of the muscle is termed
What is the motor neuron
400
Once the myosin head has undergone detachment from the myosin bindin site, what is primarily responsible for the gain in total span of the z disks?
What is muscle elasticity
500
The initiator of the bringing together movement of the thick and thin filament is
What is the dissociation of Pi
500
The Ca2+ released by the SR that is not used during contraction ends up here
What is back in the sarcoplasmic reticulum
500
For this reason, the cell needs less stimulation to undergo action potential as we make the intracellular level more positive
What is getting close to threshold value
500
The region of the neuron directly above the synaptic cleft is termed this
What is pre synaptic plate
500
Over secretion of AcH via continuous stimulation of Action Potentials will eventually result in this