3. The inside surface of sarcolemma is negatively charged compared to the outside surface. Sodium ions diffuse inwards along favourable chemical and electrical gradient.
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3 of 9 Part F Sodium and potassium ions do not diffuse in equal numbers through...
What is the main function of the sodium potassium pump in the neuron? a. Establish concentration gradients for sodium and potassium ions. b. Depolarize the membrane to threshold. c. Make the inside of the cell more negative than the outside. d. Make the inside of the cell more positive than the outside. e. Pump ions down their concentration gradients during an action potential. A patient of yours has been poisoned by a toxin which prevents fast repolarization of the membrane...
Choose best answer 1. The primary movement of ions across the sarcolemma during an action potential that stimulates a skeletal muscle fiber to contract is: a. sodium inward and potassium outward b. sodium outward and potassium inward c. both sodium and potassium inward d. both sodium and potassium outward 2. The chemical substance that transmits the electrical impulse from the alpha motor neuron to the sarcolemma of the muscle fiber is: a. norepinephrine b. adrenalin c. beta-endorphin d. acetylcholine 3....
change pas channels in the volta t ive protein to change shape. This A of the S l e terminal siste oplasmic reticum calcio p r eneule warcoplasm reticulum sodium ions m o nster transverse tubules sarcolemma: calcium ions Saroplasmic reticum: triadsarcolemma: calcium ions sons bind to This causes a change in shape and exposing C D E Calcium vesicle tylcholine action potential Sodium sarcolemma calcium on myosin heads Sodium sacoplasmic reticulum calcium ions actin 15. An attaches to exposed...