(a)[3]
Use the details in Table 3.1 to compare the small-intestine length of the four mammals.
(b)[3]
Absorption is one role of the small intestine. Describe how a glucose molecule moves from the lumen of the small intestine into the blood.
(c(i))[1]
Suggest which mammal possesses the greatest number of villi per centimetre of small intestine.
(c(ii))[3]
The duodenum absorbs more effectively than the ileum. Use the information in Table 3.2 to explain why.
(d)[4]
Bile is released into the small intestine from the gall bladder. Outline the roles of bile.