Muscle- Part 1 Flashcards
What is the junction between motor neurons and skeletal muscle which resembles a synapsis?
Motor end plate
What is the true plasma membrane?
Sarcolemma
What is the area between two Z-disks?
Sacromere
What is the functional unit which contains actin and myosin?
Sacromere
What zone only has thick filaments?
H-zone
Which disks are anchoring proteins?
Z-disks
What has the function of storage of Ca++?
Sarcoplasmic reticulum
What is transverse tubules?
T-tubules
What invaginates the sarcolemma in close proximity to the sarcoplasmic reticulum?
T-tubules
What type of polarization is the result of T-tubules conduction to the interior of the muscle fiber?
Depolarization
Depolarization and AP conduction:
What is released from a motor neuron that induces the formation of an end-plate potential (EPP) on the sarcolemma?
ACh
Depolarization and AP conduction:
The EPP made from the release of ACh from the motor neuron, spreads to the interior of the muscle cell along the _ ______, reaching the sarcoplasmic reticule
T-tubules
What releases from the sarcoplasmic reticule into the cytosol for contraction cycle?
Ca++
At rest, how is Ca++ is pumped back into the SR?
ATP-Dependent transport system
What type of channels does Ca++ use in muscle contraction?
Voltage-gated
