TLS Online TPP Program

#Question id: 1098


Which of the following is the most plausible explanation for why an animal cell would be unable to reduce the Ca2+ concentration in its cytosol compared with the extracellular fluid?

#XL - Q Biochemistry
  1. inactivation of calcium-gated ion channels in the cell membrane

  2. excessive transport of calcium from the cytosol into the endoplasmic reticulum

  3. insufficient ATP levels in the cytosol

  4. insufficient levels of protein kinase in the cell