Question: Q: In mammals, air is warmed and humidified in what? Choices: - lungs - stomach - esophagus - nasal cavity A:
Answer: nasal cavity

Question: Q: Protein digestion begins in the stomach as pepsinogen in gastric juice is converted to pepsin, the enzyme that hydrolyzes this? Choices: - disulfide bridges - hydrogen bonds - ionic bonds - peptide bonds A:
Answer: peptide bonds

Question: Q: What type of compound is hydrogen chloride? Choices: - polar - metal - ionic - covalent A:
Answer:
covalent