Answer:
Stem cells are currently being used to replace damaged cells or to treat some forms of cancer, usually taken from the adult hip (bone marrow)
When myosin head bind to the actin, it will form a cross bridge and causes a power stroke to occur. It will hydrolyse the ATP to ADP + Pi in the ATPase of the myosin head and the myosin head will detached from actin and tilt back to its original position. Hence the sarcomere will shorten
The correct option is A.
When an end of a tuning fork that is vibrating is placed against a table, it produces a sounder that is dramatically louder than the original sound produced by the vibrating tuning fork. At this stage, the tuning fork is forcing the table to vibrate at its own frequency. Thus, the statement in option A is not true.
C. because stimuli is how your body responds to something, and in this case, someone's heart rate increases WHEN their blood oxygen drop. Do you see how it responds? ;-)
