Question

question 15 (4 points) (2.54 mc) the contracting and relaxing of muscle is regulated by the amount of calcium present in the cells of muscle fibers. these cells must be able to move the calcium ions from areas with low concentrations to areas with high concentrations. what process would be necessary for this movement to occur? a osmosis b active transport c passive transport d facilitated diffusion

Explanation:

Diffusion and passive - facilitated diffusion move substances from high to low concentration. Osmosis is the movement of water. Active transport moves substances against the concentration gradient (from low to high concentration). Since calcium ions need to move from low to high concentration, active transport is required.

Answer:

B. Active transport