bio 360 exam 2

myofibril

sections of muscle cells that contain sacromeres

sacromeres

parts of muscle cells that contain myosin and actin

myosin

thick filament in the myofibril that pulls actin to contract muscles once it binds, has the power

actin

thin filaments in the myofibril that is pulled by myosin

t-tubule

structure in muscle cells where action potential goes deep into the cell, causing further pathway changes

DHP receptor

voltage gated receptor at the bottom of the t-tubule that is connected to the Ryr receptor with a molecular rope

ryanodine receptor

ion receptor that is activated by the pulling of a molecular rope attached to the DHP receptor

sarcoplasmic reticulum

structure in the muscle cell that contains high amounts of calcium, calcium released with the opening of the Ryr receptor

what type of receptor is ACh in the neuromuscular junction

ionotropic

troponin

receptor on actin that calcium binds to to move tropomyosin, allowing for myosin to bind to actin

tropomyosin

rope like structure on actin that covers myosin binding cites, moved when calcium binds to troponin

Ca2+ - ATPase pump

pumps Ca2+ against its gradient back into the sarcoplasmic reticulum to allow for the muscle to relax

malignant hyperthermia

genetic mutation caused by exposure to anesthetics, causes muscle rigidity, high temperature, increase in heart rate, CO2, and breathing

when is stress good

before learning and consolidation

diving response

stimulation of the vagus nerve when underwater, slows down the body