A cell has a defect the results in the loss of its ability to regulate the movement of water, food, and wastes into and out of cell. In which of the following cell structures is this debt most likely to be located A. Ribosomes
B. Chloroplasts
C. Cell Membrane
D. Endoplasmic reticulum

it’s lava came from an explosive eruption

answer; ///blank(1); green bananas; blank(2); raw potatoes;

the answer is: the „power stroke“ step.

muscle contraction can be divided into a few steps:

1. the release of ach (acetylcholine) in the synaptic cleft, binding of ach for its receptor and consequently opening of the ca channels.

2. the release of ca, binding of ca for the troponin

3. troponin shifting the tropomyosin, which was blocking the active site on the actin

4. myosin heads attaching to actin by breaking down atp to adp+ pi

5.   formation of the ‘cross-bridge’ on the active site of the actin filament by myosin head

6. “power stroke” -the cross bridge pulls actin, which slides over the myosin

9.     7. the release of adp completes the cross-bridge movement and atp attaches to myosin, breaking the actin-myosin cross bridge.