Leslie has just finished a brutal military tour against opposing forces. He lost a number of his friends but was able to fight on despite the death around him. Two of the stress hormones at play in his system are:

A. cortisol and epinephrine.

B. oxytocin and epinephrine.

C. epinephrine and antibodies.

D. epinephrine and lymphocytes.

Option-A

Explanation:

The nervous system which is activated during stress condition is known as the sympathetic nervous system.

The sympathetic system produces the response to fight or flight in the body. The body releases hormones during stress condition which are the epinephrine and the cortisol. Both the hormones are produced from the adrenal gland.

In the given question, since the person is in stressed condition but she is still fighting therefore the stress hormones are produced in large amount and the main hormones are the epinephrine and cortisol.

Thus, Option-A is correct.

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.