Ahiker is climbing up a steep path. halfway up, he finds the muscles in his legs are experiencing a burning and aching sensation. what is the most likely cause of these symptoms?

Which of the following is true of metabolism in its entirety in all organisms? a) metabolism depends on a constant supply of energy from food. b) metabolism uses all of an organism's resources. c) metabolism consists of all the energy transformation reactions in an organism. d) metabolism manages the increase of entropy in an organism.