This document outlines the content for a biology lesson on human nutrition for senior year students. It includes three main topics: enzymes, the human digestive system, and pathogens. For enzymes, it asks students to define enzymes, state their optimal conditions, and outline the roles of specific enzymes in protein, fat, and starch digestion. For the human digestive system, it instructs students to label a diagram of the digestive system and indicate where digestive substances like hydrochloric acid and enzymes are produced. It also provides a table on fruit composition. Finally, it asks students to define the term pathogen.

1. Materia: Biology Senior 3
Profesora: Ma. Magdalena Ravagnan
Contenido nodal: Nutrition in humans: part 1
PRIMER TRIMESTRE
Fecha de presentación: Monday December 11th
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

2. (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)

3. c)
3) Define the term pathogen …………………………………………………………………………………………………
……………………………………………………………………………………………………………………………..