1. The mucus in the stomach protects the stomach tissues from the action of enzymes.   True   False   2. How many teeth does an adult human being normally have?   16   20   30   32   Hint Half-n-half Clue   3. The part of the tooth inside the socket of the jaw is known as the _______.   enamel   dentine   crown   root   Half-n-half Clue   4. There are _______ pairs of salivary glands present in the mouth.   2   3    4    6   Half-n-half Clue   5. A tooth is made up of a solid bony tissue known as _______.   dentine   enamel   crown   root   Half-n-half Clue   6. The part of the tooth outside the socket of the jaw is known as the crown.   True   False   7. The stomach is lined with mucous membrane.   True   False