Activation of muscle contraction could be a speedy event that's initiated by electrical activity within the surface membrane and transversal (T) tubules. This can be followed by unharness of metal<span> from the inner membrane system, the sarcoplasmic reticulum.
</span>Nervous stimulation causes a depolarization<span> of the muscle membrane (sarcolemma) </span>that<span> triggers </span>the discharge<span> of </span>calcium<span> ions from the sarcoplasmic reticulum.</span>
C
Brown algae
Im pretty sure this is correct
Answer:
Explanation:
Water in the lake (hydrosphere) seeps into the cliff walls behind the dam, becoming groundwater (lithosphere), or evaporating into the air (atmosphere). Humans (biosphere) harness energy from the water (hydrosphere) by having it spin turbines (lithosphere) to produce electricity.
Answer:
Celestial microwave radiation found a strange microwave signal causing background noise in the radio telescope. The signal came from every direction. The young universe would have been very hot. The microwave background radiation is the remaining heat from the Big bang.
I tried my hardest and this is what I put on MY test so good luck
