Digestive system

Question 1

Ingestion

Answer 1

Taking in of substances

Question 2

Mechanical digestion

Answer 2

Breaking down of food into smaller pieces without any chemical change to the food mol.

Question 3

Chemical digestion

Answer 3

The breakdown of large insoluble molecules into smaller soluble ones

Question 4

Absorption

Answer 4

Movement of smaller molecules and ions through small intesine into the blood

Question 5

Assimilation

Answer 5

the movement of digested food molecules into the cells of the body where they are used, becoming part of the cells

Question 6

Egestion

Answer 6

he passing out of food that has not been digested or absorbed, as faeces, through the anus

Question 7

What is the function of the mouth

Answer 7

• Mechanical digestion
• Teeth chew food the break it into smaller sized peices
• amylaze in the mouth starts to digest the starch into maltose
• Food is shaped into a bolus by tongue and then swallowed

Question 8

What is the function of the easophagus

Answer 8

• Tube that connects mouth to the stomach
• Perastalisis takes place pushing food down

Question 9

What is the function of the Small Intestine

Answer 9

• first section is called duodenum where in pancreatic juice and the digested food comes out of the stomach and the pancreatic juice is also secreted from the pancreas
• Ph of small intestine is slightly basic
• The second section is called the Ileum this is where the absorption occurs as it is long and lined with villi

Question 10

What is the function of the large intestine

Answer 10

• Water is absorbed by remaining material in colon, to produce faeces
• faeces is stored in rectum and removed by the anus

Question 11

What is the function of the pancreas

Answer 11

• Produce all 3 types of enzymes: Protease, lipase and amylase
• ## Secretes alkaline fluid into duodenum for digestion to raise ph fluid coming out of the liver

Question 12

What is the function of the liver

Answer 12

• Produces bile to help in the emulsification of fats break down large fat droplet into smaller ones
• Deamination (produces Urea)

Question 13

Gall Bladder

Answer 13

Store bile to release into the duodenum as required

Question 14

Physical Digestion examples

Answer 14

It is mainly carried out by the chewing action of the teeth, the churning action of the stomach and the emulsification of fats by bile in the duodenum

Question 15

What is the function of the teeth

Answer 15

• Used for chewing to increase the surface area, so that it can be exposed to juices and other digestive enzymes so food can get broken down more quickly

Question 16

Function of Incisors

Answer 16

• chisel - shaped
• Biting and cutting

Question 17

Function of Canines

Answer 17

• To help tear, hold and bite
• pointed

Question 18

Function of Premolars and molar

Answer 18

Large flat surfaces with ridges at the edges for chewing and grinding up food

Question 19

role of the stomach

Answer 19

• muscles which contract to physically
• squeeze and mix the food with the strong digestive juices that are present
• stomach churning

Question 20

Epithelial tissue

Answer 20

tissue lines organs

Question 21

Biles two main roles

Answer 21

• ## Alakine to neutralise the HCL which comes from the stomach