Imagine that you are walking in the woods for fun and all of a sudden you see amountain lion. Your hair stands up, you begin to sweat and your heart beataccelerates as you prepare to run away. What fueled the energy for the run? a. The binding of epinephrine to tyrosine kinase receptors and consequent initiation of a response that leads to muscle contraction that allows you to run
b. The activation of a G-protein receptor that leads to the secretion of a protein that makes you run.
c. The binding of epinephrine to a G-protein coupled receptor with the subsequent activation of a nuclear receptor.
d. The initiation of a signaling mechanism that leads to breakdown of glycogen into glucose that can then serve as the fuel for ATP production.
e. All of the above

The correct answer is - D. The initiation of a signaling mechanism that leads to the breakdown of glycogen into glucose that can then serve as the fuel for ATP production.

Explanation:

In challenging or dangerous conditions, the body releases a hormone called Epinephering which is a fight or flight hormone that provides a high amount of energy for the particular action.

Epinephrine hormone binds to beta-adrenergic receptors present on muscles and responsible for the rapid conversion of glycogen to glucose-1-phosphate. The glucose results in condition to rapid synthesis of ATP in muscles and thus helps in muscle actions.

- The flow of energy is from the lowest level (i.e., the base of the pyramid)  to highest levels

- Approximately 10 percent

Explanation:

The energy pyramid is a diagram that shows the flow of energy between trophic levels in an ecosystem. Each trophic level is characterized by organisms that play specific roles in an ecosystem, for example, photosynthetic organisms (producers) at the base of the pyramid which represent the source of energy for herbivores localized at a higher level. The amount of energy decreases as it moves to higher trophic levels, approximately 10 percent of the energy is transferred from a trophic level to the next level and the remaining energy is lost as heat.