In which situation would calcium enter the cell through active transport? O The cell is 20% calcium, and the cell's environment is 80% calcium.
O The cell is 50% calcium, and the cell's environment is 50% calcium.
O The cell is 40% calcium, and the cell's environment is 60% calcium.
O The cell is 80% calcium, and the cell's environment is 20% calcium.

Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria

Amylase becomes denatured at a temperature of 80°c. during an experiment to study the effect of varyingtemperature on enzyme activity, amylase’s reactivity with starch was measured at body temperature (37°c), andthen again at an increased temperature of 42°c. how would this increase in temperature affect the experiment

Amajor source of energy for your body comes from