Cytosolic Ca2+ concentrations typically rise about 50-fold when Ca2+ channels open in the plasma membrane. Assume that 1000 Ca2+ channels open in a cell with a volume of 1000 µm3 and an internal Ca2+ concentration of 100 nM. If each Ca2+ channel passes 106 Ca2+ ions per second, how long […]

Individually students will be required to develop a position statement related to a specific topic that clearly demonstrates applicable standards of practice within the nursing profession. The Criterion referenced rubric for this assessment (page 15 Unit outline). Topics will be chosen from a list provided on LEO. Information contained in […]

1. In an inherited condition called glycogen cardiomyopthy teenagers develop muscle weakness which affects heart as well as other muscles. Samples of the affected muscle cells contain huge lysosomes, swollen with the carbohydrate glycogen. How might this condition arise? 2. Why does a muscle cell conatin many mitochondrion while a […]

1.    Where is genetic material found in plant cells?   2.       Mitochondria are the only organelles that contain their own DNA (circular) and have a double membrane.  Why do you think this might be so?   Hint 1:  Where else do we see circular DNA?) Hint 2:  What do you know about the relative age […]