Multiple choice

Which of the following organelles would you select, if the given statement is considered to be an absolute fact? “More the levels of intracellular IP3 (inositol Triphosphate), more is the efflux of Ca++ from its membranes in the cytoplasm.”

  1. Lysosomes

  2. Mitochondria

  3. Peroxisomes

  4. Endoplasmic reticulum
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Ca++ channel in the membrane of endoplasmic reticulum is also an IP3 receptor and therefore, an increase in IP3 will enhance the activity of the channel, resulting in increased efflux of ions.

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