Which of the following are true in regard to Ca2+ in the cell? Increased local C
ID: 256293 • Letter: W
Question
Which of the following are true in regard to Ca2+ in the cell? Increased local Ca2+ opens nearby IP3 and Ryanodine receptors by calcium- induced calcium release. Ca2+ directly activates PKA by releasing it from inhibitory subunits The frequency of Ca2+ oscillation can code a specific cellular response Calcium ATPases in the plasma membrane and ER help to maintain low levels of calcium in the cytosol The large gradient tending to drive Ca2+ into the cytosol from both the ER and plasma membranes leads to Ca2+ rushing into the cytosol when Ca2+ channels are activated.Explanation / Answer
The following two options are true in regard to Ca+2 in the cell.
Increased local Ca+2? opens nearby IP3 and Ryanodine receptors by calcium induced calcium release.
Calcium ATPase in the plasma membrane and ER help to maintain low levels of calcium in the cytosol.