Although the absolute level of tumor marker did not correlate with prognosis, a normal value indicated an improved survival. CEA was elevated in 35.2 % of 110 patients determined to have recurrent disease and CA 19-9 was elevated in 62.9 %. At least one of the tumor markers was elevated in 68.2 % of patients.
Cell Membrane In BOTH types of cells. Controls what goes in and out of the cell. Chloroplast In a PLANT CELL. Captures energy from sunlight. Uses energy to produce cell food, which is sugar. Process called photosynthesis. Cytoplasm In BOTH types of cells. Houses gel-like fluids that support cell organelles. Endoplasmic Reticulum In BOTH types of cells.
The simplest way that a cell membrane can control what goes in and out is to have a protein channel that fits only one type of molecule. In this way, the cell can control the flow of just water, salts, or the hydrogen ions that make a liquid acidic or not acidic.