Answer to Question 1
acetaldehyde
Answer to Question 2
Carbohydrates
Metabolizes fructose, galactose, and glucose
Makes and stores glycogen
Breaks down glycogen and releases glucose
Breaks down glucose for energy when needed
Makes glucose from some amino acids and glycerol when needed
Converts excess glucose and fructose to fatty acids
Fats
Builds and breaks down triglycerides, phospholipids, and cholesterol as needed
Breaks down fatty acids for energy when needed
Packages lipids in lipoproteins for transport to other body tissues
Manufactures bile to send to the gallbladder for use in fat digestion
Makes ketone bodies when necessary
Proteins
Manufactures nonessential amino acids that are in short supply
Removes from circulation amino acids that are present in excess of need and converts them to other amino acids or deaminates them and converts them to glucose or fatty acids
Removes ammonia from the blood and converts it to urea to be sent to the kidneys for excretion
Makes other nitrogen-containing compounds the body needs (such as bases used in DNA and RNA)
Makes many proteins