Chapter 6: Nutrition in mammals

Define Holozoic Nutrition.

It is the "type of nutrition" found "in animals". It "involves ingestion of complex organic nutrients" and its "digestion, absorption and assimilation".

What is Peristalsis?

It is is the "rhythmic wavelike muscle contraction" of the "walls of oesophagus", this "helps push food ahead" towards the stomach.

Describe the passage of food through alimentary canal.

Mouth - Oesophagus - Stomach - Small Intestine - Large Intestine - Rectum

What is the function of mouth?

Function is to "chew and break down food" into smaller pieces with the help of "teeth".

tissue cells

When the ________ of the body are in need of glucose they obtain it from the blood.

new protoplasm

Which enter the the cell are converted into ________ and are used for growth and repair of worn- out parts of the body.

What is the function of HCL secreted in stomach?

It "stops the action of salivary amylase" + changes the "inactive forms of of enzymes in the gastric juice to the active form" + "provides a slightly acidic medium' suitable for the action of gastric enzymes + "kills germs".

What role does the pancreas play in digestion?

It secretes "pancreatic enzymes".

What is Bile?

Bile is an "alkaline greenish-yellow liquid" containing "bile salts and bile pigments" + it "aids in the digestion of fats".

How are villi adapted for absorption?

They "have thin walls" + "large surface area" +"good supply of blood".

What is the function of Large Intestine?

Its role is to help "water is reabsorb in blood"

What is the function of rectum?

Its role is to temporarily "store faeces".

Where in alimentary canal is amylase secreted?

It is secreted in "pancreas + salivary canal" (mouth).

Where in alimentary canal is protease secreted?

It is secreted in "pancreas + stomach".

Where in alimentary canal is lipase secreted?

It is secreted in "pancreas".

Give two example of protease enzyme.

Two examples are "pepsin + trypsin".