Which of the
following carry nutrients to all parts of the body?
a) water
b) blood
c) lymph
d) hormones
How villi help in the absorption of digested food from small intestine into the blood?
a) they increase the surface area
b) they are less in number
c) their osmotic pressure is high d) all of these
How many adult teeth are present in an adult?
a) 10
b) 4
c) 20
d) 32
Acid in your stomach can dissolve and iron nail. Which of the following in the stomach protects it from its own acid?
a) a thick layer of mucus
b) salts
c) alkali
d) all of these
Where do the friendly bacteria in our digestive tract?
a) liver
b) small intestine
c) stomach
d) large intestine
Which of the following vitamin is produced by friendly bacteria living in the large intestine?
a) vitamin A
b) vitaminB
c) vitamin K
d) vitamin C
