The nutrient that is not digested but stimulates intestinal muscle contractions is fiber. Fiber is a type of carbohydrate that may be soluble or insoluble.
Starch is digested by ptyalin.
potein
Segmentation- series of stationary rhythmic contractions and relaxations of rings of intestinal smooth muscle; mixes intestinal contents. Segmentation mixes the cyme with intestinal secretions and brings it into repeated contact with the absorptive epithelium. The slow passage insures nutrient absorption.
Protien
Nothing is digested by the liver in the digestive system at all. So there is basically no answer to it.
Saliva
It is starch! I think
Starch (carbohydrates) is broken down (digested) to maltose by salivary amylase.
CelluloseAnswer:To be a nutrient a food material has to be digested and incorporated into the body as stored fat, converted to muscle or other protein, or converted to energy. So no nutrient as "not digested"/ Non-nutrient materials which provide other functions are fiber and water, and minerals asn trace chemicals such as salt, iron, zinc. Vitsmins can be regarded as supplimental to the body's own production. fibre can not be digested
fats
Because it is in a form which is already digested e.g honey. Honey is already digested by bees so it is far more easier for the human digestive system to absorb.
== == Vitamin c and d.