Materia: Biology Senior 3

Profesora: Ma. Magdalena Ravagnan

Contenido nodal: Nutrition and transport in humans

SEGUNDO TRIMESTRE

Fecha de presentación: Tuesday December 10th

A- Enzymes

(a) What is an enzyme?

(b) State the conditions in which enzymes work best.

(c) Outline the parts played by named enzymes in each of the following processes.

i- protein digestion in the alimentary canal.

ii- fat digestion in the alimentary canal.

iii- starch digestion in the alimentary canal.

B- Human nutrition

1) Fig.1 shows the human digestive system

(a) Label on the diagram: mouth- oesophagus- stomach- small intestine- large intestine- anus-

Liver- pancreas- gall bladder

(b) Using the appropriate letter, label where each of the following is produced:

- an amylase, (A) - bile (D)

- hydrochloric acid, (B) - pepsin (E)

- a lipase, (C) - absorption (F)

2) Table 1 shows information about the composition of a fruit.

a)

b)

c)