Answer:

Explanation:
Let's think about this from a human perspective (humans are multicellular organisms).
Humans inhale oxygen to use in cellular respiration. Carbon dioxide is the waste product of the process and it is exhaled.
Humans consume proteins and make proteins in protein synthesis. They are used for all sorts of things such as: hormones, repairing tissues, catalysts, providing structure, and more.
So, clearly, the substance that is let out is<u> carbon dioxide</u>. It is exhaled as waste when we breathe, but proteins are used inside the body.
Answer: Reye's Syndrome
Explanation:
The use of acetylsalicylic acid or aspirin is limit in children under 16 years old to treat fever or pain, as this substance is associated with a rare but serious complication, especially during chickenpox and flu, called Reye's syndrome. Although this syndrome is not yet fully understood, there are several studies relating Reye's Syndrome to the use of salicylate-containing medicines, including acetylsalicylic acid. Thus, the onset of this syndrome in children is related to the administration of infant aspirin. Reye's syndrome mainly affects children between 4 and 14 years. The symptoms of this syndrome are added to those already suffered by the child due to the viral process that affects them, such as the flu or chickenpox. The most common are vomiting, diarrhea, drowsiness and irritability. Later, the child may be confused, with muscle weakness, and even seizure and lose consciousness.
She can eat healthy foods like fruit and vegetables and maybe go for a walk for 10 or 20 minutes a day.
Answer:
When alcohol is used to try to relieve stress or escape from problems.
Explanation:
The principle of progression talks about the requirement to increment or increase gradually the difficulty of workload. This way of workout will increase the physical strength and body stamina. If a person wants to develop more power on his legs, the frequency, time, difficulty or intensity of workout should be lengthen or increased because this will progress the muscle.