OPTION H2.4-2.6FURTHER

PHYSIOLOGY

Devon Scholz

H2.4- Outline the control of digestive juice secretion by nerves and hormones, using the example of secretion of gastric juice.

Pre- Ingestion:

Post- Ingestion

Pre-Ingestion1. __________ _____ are produced to

hydrolyze the molecules in need of digestion.

2. _______ and ________ of ______cause gastric juice to be secreted in the ________.

Post Ingestion1. _________ is the stretching of the stomach

wall and causes ______ to send a signal to the brain.

2. This causes _______ to be produced and ______ sustains the amount of gastric juices in the Stomach.

H2.5- Outline the role of membrane-bound enzymes on the surface of epithelial cells in the small intestine in digestion.

Photo 50.44 Human ileum: mucosa composed of villi, crypts lined by simple columnar epithelium.

Example:

Membrane bound enzymes:1. What is one benefit of having a membrane

bound enzyme?

2. What is an example of a membrane-bound enzyme and where is it located?

Photo 50.47 Absorptive cells and microvilli in monkey small intestine. SEM.

H.2.6-Outline the reasons for cellulose not being digested in the alimentary canal.

http://www.as.miami.edu/chemistry/2086/chap%2024/chapter%2024-newpart2.htm

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